九天国际教育GCSE真题Specimen QP - Paper 1 CIE Chemistry IGCSE

九天国际教育GCSE真题June 2013 (v3) QP - Paper 3 CIE Chemistry IGCSE

READ THESE INSTRUCTIONS FIRSTWrite your Centre number, candidate number and name on all the work you hand in.Write in dark blue or black pen.You may use a pencil for any diagrams, graphs or rough working.Do not use staples, paper clips, highlighters, glue or correction ﬂ uid.DO NOT WRITE IN ANY BARCODES.Answer all questions.Electronic calculators may be used.A copy of the Periodic Table is printed on page 12.You may lose marks if you do not show your working or if you do not use appropriate units.At the end of the examination, fasten all your work securely together.The number of marks is given in brackets [ ] at the end of each question or part question.CHEMISTRY0620/33Paper 3 (Extended)May/June 20131 hour 15 minutesCandidates answer on the Question Paper.No Additional Materials are required.UNIVERSITY OF CAMBRIDGE INTERNATIONAL EXAMINATIONS International General Certiﬁ cate of Secondary EducationThis document consists of 11 printed pages and 1blank page.[Turn overIB13 06_0620_33/2RP © UCLES 2013*6258911381*For1S ubstances can be classiﬁ ed as:Examiner’sUseelements mixtures compoundsE lements can be divided into:metals non-metals(a)D eﬁ ne each of the following terms.(i)e lement.................................................................................................................................... (2)(ii)c ompound.................................................................................................................................... (2)(iii)m ixture.................................................................................................................................... (1)(b)C lassify each of the following as either an element, compound or mixture.(i)b rass (1)(ii)c arbon dioxide (1)(iii)c opper (1)(c)W hich physical property is used to distinguish between metals and non-metals?I t is possessed by all metals but by only one non-metal. (1)[Total: 9]© UCLES 20130620/33/M/J/13For2O ne of the factors which determine the reaction rate of solids is particle size.Examiner’sUse(a)A mixture of ﬁ nely powdered aluminium and air may explode when ignited.A n explosion is a very fast exothermic reaction. This causes a large and sudden increasein temperature.E xplain each of the following in terms of collisions between reacting particles.(i)W hy is the reaction between ﬁ nely powdered aluminium and air very fast?.................................................................................................................................... (2)(ii)E xplain why for most reactions the rate of reaction decreases with time..................................................................................................................................... (2)(iii)S uggest an explanation why the rate of reaction in an explosion could increase rather than decrease with time......................................................................................................................................................................................................................................................................... (3)(b)(i)G ive another example of a substance other than a metal which, when ﬁ nelypowdered, might explode when ignited in air. (1)(ii)D escribe a simple test-tube reaction which shows the effect of particle size on the rate at which a solid reacts with a solution......................................................................................................................................................................................................................................................................... (3)[Total: 11]© UCLES 2013[Turn over0620/33/M/J/130620/33/M/J/13© UCLES 2013ForExaminer’sUse3I ron from the blast furnace is impure. It contains 5% of impurities, mainly carbon, sulfur, silicon and phosphorus. Almost all of this impure iron is converted into the alloy, mild steel.(a) (i) S tate a use of mild steel. (1)(ii) N ame and give a use of another iron-containing alloy.name ..........................................................................................................................use (2)(b) T he oxides of carbon and sulfur are gases. The oxides of silicon and phosphorus are not.Explain how these impurities are removed from the impure iron when it is converted into mild steel............................................................................................................................................ ........................................................................................................................................... ........................................................................................................................................... ........................................................................................................................................... (5)[Total: 8]4G ermanium is an element in Group IV. The electron distribution of a germanium atom is 2 + 8 + 18 + 4. It has oxidation states of +2 and +4.(a) G ermanium forms a series of saturated hydrides similar to the alkanes.(i) D raw the structural formula of the hydride which contains three germanium atomsper molecule.[1](ii) P redict the general formula of the germanium hydrides. (1)0620/33/M/J/13© UCLES 2013[Turn overFor Examiner’sUse(b) D raw a diagram showing the arrangement of the valency electrons in one molecule ofthe covalent compound germanium(IV ) chloride, GeC l 4.Use o to represent an electron from a chlorine atom.Use x to represent an electron from a germanium atom.[2](c) D escribe the structure of the giant covalent compound germanium(IV ) oxide, GeO 2.I t has a similar structure to that of silicon(IV ) oxide............................................................................................................................................ ........................................................................................................................................... (3)(d) I s the change GeC l 2 to GeC l 4 reduction, oxidation or neither? Give a reason for your choice............................................................................................................................................ (2)[Total: 9]5A ll metal nitrates decompose when heated. A few form a nitrite and oxygen. Most form the metal oxide, oxygen and a brown gas called nitrogen dioxide.(a) (i) N ame a metal whose nitrate decomposes to form the metal nitrite and oxygen. (1)(ii) C omplete the equation for the action of heat on lead(II ) nitrate.......Pb(NO 3)2 → ......... + ......NO 2 + O 2 [2](iii) S uggest why the nitrate of the metal, named in (a)(i), decomposes less readily thanlead(II ) nitrate..................................................................................................................................... (2)0620/33/M/J/13© UCLES 2013For Examiner’sUse(b) A lmost all samples of nitrogen dioxide are an equilibrium mixture of nitrogen dioxide,NO 2, and dinitrogen tetroxide, N 2O 4.forward reactionreverse reactionN 2O 4(g)colourless2NO 2(g)dark brownI n the forward reaction, a bond forms between the two nitrogen dioxide molecules.NO 2 + NO 2 → O 2N – NO 2(i) E xplain the term equilibrium mixture ..................................................................................................................................... .............................................................................................................................. [1] (ii) T he syringe contains a sample of the equilibrium mixture. The plunger was pulledback reducing the pressure.H ow would the colour of the gas inside the syringe change? Give an explanation foryour answer..................................................................................................................................... .................................................................................................................................... .............................................................................................................................. [3] (iii) A sealed tube containing an equilibrium mixture of nitrogen dioxide and dinitrogentetroxide was placed in a beaker of ice cold water. T he colour of the mixture changed from brown to pale yellow.I s the forward reaction exothermic or endothermic? Give an explanation for your choice..................................................................................................................................... (2)(iv) W hat other piece of information given in the equation supports your answer to (iii)?NO 2 + NO 2 → O 2N–NO 2 (1)[Total: 12]0620/33/M/J/13© UCLES 2013[Turn overForExaminer’sUse6S ulfuric acid and malonic acid are both dibasic acids. One mole of a dibasic acid can form two moles of hydrogen ions.H 2SO 4 → 2H + + SO 42–D ibasic acids can form salts of the type Na 2X and CaX.(a) M alonic acid is a white crystalline solid which is soluble in water. It melts at 135 °C.T he structural formula of malonic acid is given below. It forms salts called malonates.CH 2(COOH)2 or HOOC – CH 2 – COOH(i) H ow could you determine if a sample of malonic acid is pure?technique used .......................................................................................................... result if pure (2)(ii) W hat is the molecular formula of malonic acid? (1)(iii) W hen malonic acid is heated there are two products, carbon dioxide and a simplercarboxylic acid. Deduce the name and molecular formula of this acid..................................................................................................................................... .............................................................................................................................. [2] (iv) M alonic acid reacts with ethanol to form a colourless liquid which has a ‘fruity’ smell.I ts structural formula is given below.CC OOO OCH2CH 2CH 3CH 2CH 3W hat type of compound contains the group which is circled? (1)0620/33/M/J/13© UCLES 2013For Examiner’sUse(b) (i) S uggest why a solution of malonic acid, concentration 0.2 mol / dm 3, has a higher pHthan one of sulfuric acid of the same concentration. (1)(ii) D escribe a test, other than measuring pH, which can be carried out on both acidsolutions to con ﬁ rm the explanation given in (b)(i) for the different pH values of the two acids..................................................................................................................................... (2)(c) C omplete the following equations for reactions of these two acids.(i) sodium hydroxide + malonic acid → .................... + ....................[1].................... (ii) CuO + H 2SO 4 → .................... + .................... [2] (iii) Mg + CH 2(COOH)2 → .................... + ....................[2](iv) K 2CO 3 + H 2SO 4 → .................... + .................... + ....................[2][Total: 16]7 A lkanes and alkenes are both series of hydrocarbons.(a) (i) E xplain the term hydrocarbon ..................................................................................................................................... (1)(ii) W hat is the difference between these two series of hydrocarbons?.................................................................................................................................... (2)(b) A lkenes and simpler alkanes are made from long-chain alkanes by cracking.C omplete the following equation for the cracking of the alkane C 20H 42.C 20H 42 → 2C 4H 8 + 2C 2H 4 + ...............[1]0620/33/M/J/13© UCLES 2013[Turn overForExaminer’sUse(c) Alkenes such as butene and ethene are more reactive than alkanes.A lkenes are used in the petrochemical industry to make a range of products, which includes polymers and alcohols.(i) D ibromoethane is used as a pesticide. Complete the equation for its preparationfrom ethene.C C + Br 2 →HHH H[1](ii) T he structural formula of a poly(alkene) is given below.nC CH 3C CH 3HHD educe the structural formula of its monomer.[2](iii) H ow is butanol made from butene, CH 3 – CH 2 – CH = CH 2? Include an equation in your answer..................................................................................................................................... (2)(iv)C racking changes alkanes into alkenes. How could an alkene be converted into analkane? Include an equation in your answer..................................................................................................................................... (2)0620/33/M/J/13© UCLES 2013ForExaminer’sUse(d) 20 cm 3 of a hydrocarbon was burnt in 175 cm 3 of oxygen. After cooling, the volume ofthe remaining gases was 125 cm 3. The addition of aqueous sodium hydroxide removed carbon dioxide leaving 25 cm 3 of unreacted oxygen.(i) v olume of oxygen used = .......... cm 3 [1] (ii) v olume of carbon dioxide formed = .......... cm 3 [1](iii) D educe the formula of the hydrocarbon and the balanced equation for the reaction..................................................................................................................................... .................................................................................................................................... .................................................................................................................................... (2)[Total: 15]11BLANK PAGEPMT12Permission to reproduce items where third-party owned material protected by copyright is included has been sought and cleared where possible. Every reasonable effort has been made by the publisher (UCLES) to trace copyright holders, but if any items requiring clearance have unwittingly been included the publisher will be pleased to make amends at the earliest possible opportunity.University of Cambridge International Examinations is part of the Cambridge Assessment Group. Cambridge Assessment is the brand name of University of Cambridge Local Examinations Syndicate (UCLES), which is itself a department of the University of Cambridge.G ro u p140C eC e r i u m 58141P rP r a s e o d y m i u m 59144N d N e o d y m i u m 60P mP r o m e t h i u m61150S mS a m a r i u m62152E uE u r o p i u m63157G dG a d o l i n i u m64159T bT e r b i u m65162D yD y s p r o s i u m66165H oH o l m i u m67167E rE r b i u m68169T mT h u l i u m69173Y bY t t e r b i u m70175L uL u t e t i u m71232T hT h o r i u m 90P aP r o t a c t i n i u m 91238UU r a n i u m92N pN e p t u n i u m93P uP l u t o n i u m94A mA m e r i c i u m95C mC u r i u m96B kB e r k e l i u m97C fC a l i f o r n i u m98E sE i n s t e i n i u m99F mF e r m i u m100M dM e n d e l e v i u m101N oN o b e l i u m102L rL a w r e n c i u m1031HH y d r o g e n17L iL i t h i u m 323N aS o d i u m 1124M gM a g n e s i u m1240C aC a l c i u m 2045S c S c a n d i u m 2148T i T i t a n i u m2251V V a n a d i u m 2352C r C h r o m i u m 2455M n M a n g a n e s e 2556F e I r o n 2659C o C o b a l t 2759N i N i c k e l 2864C u C o p p e r 2965Z nZ i n c3070G aG a l l i u m3127A lA l u m i n i u m1311B B o r o n 512C C a r b o n614NN i t r o g e n716OO x y g e n819FF l u o r i n e928S iS i l i c o n1431PP h o s p h o r u s1532SS u l f u r1635.5C lC h l o r i n e1740A rA r g o n1820N eN e o n104H eH e l i u m273G eG e r m a n i u m3275A sA r s e n i c3379S eS e l e n i u m3480B rB r o m i n e3584K rK r y p t o n3639KP o t a s s i u m 1988S rS t r o n t i u m 3889Y Y t t r i u m 3991Z r Z i r c o n i u m4093N b N i o b i u m 4196M o M o l y b d e n u m 42T c T e c h n e t i u m 43101R u R u t h e n i u m 44103R h R h o d i u m 45106P d P a l l a d i u m 46108A gS i l v e r47112C dC a d m i u m48115I nI n d i u m49119S nT i n50122S bA n t i m o n y51128T eT e l l u r i u m52127II o d i n e53131X eX e n o n54137B aB a r i u m 56139L a L a n t h a n u m 57*178H fH a f n i u m72181T a T a n t a l u m 73184W T u n g s t e n 74186R e R h e n i u m 75190O s O s m i u m 76192I rI r i d i u m 77195P t P l a t i n u m78197A uG o l d79201H gM e r c u r y80204T lT h a l l i u m81207P bL e a d82209B iB i s m u t h83P oP o l o n i u m84A tA s t a t i n e85R nR a d o n86F rF r a n c i u m 87227A cA c t i n i u m899B eB e r y l l i u m4II I I I II V V V I V I I 085R bR u b i d i u m 37133C sC a e s i u m 55226R a R a d i u m 88T h e v o l u m e o f o n e m o l e o f a n y g a s i s 24d m 3a t r o o m t e m p e r a t u r e a n d p r e s s u r e (r .t .p .).a Xb a = r e l a t i v e a t o m ic m a s sX = a t o m i c s y m b o lb = p r o t o n (a t o m ic ) n u m b e rK e y *58-71 L a n t h a n o i d s e r i e s 90-103 A c t i n o i d s e r i e s D A T A S H E E T T h e P e r i o d i c T a b l e o f t h e E l e m e n t sPMT。

九天国际教育GCSE真题June 2017 QP - Paper 1C Edexcel Chemistry IGCSE

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九天国际教育GCSE真题Specimen QP - Paper 5 CIE Chemistry IGCSE

PMTCambridge International Examinations Cambridge International General Certificate of Secondary Education*0123456789*CHEMISTRY Paper 5 Practical Test SPECIMEN PAPER0620/05For Examination from 2016 1 hour 15 minutesCandidates answer on the Question Paper. Additional Materials: As listed in the Confidential InstructionsREAD THESE INSTRUCTIONS FIRST Write your Centre number, candidate number and name on all the work you hand in. Write in dark blue or black pen. You may use an HB pencil for any diagrams, graphs or rough working. Do not use staples, paper clips, glue or correction fluid. DO NOT WRITE IN ANY BARCODES. Answer all questions. Electronic calculators may be used. You may lose marks if you do not show your working or if you do not use appropriate units. Notes for use in qualitative analysis are provided on pages 9 and 10. At the end of the examination, fasten all your work securely together. The number of marks is given in brackets [ ] at the end of each question or part question.The syllabus is accredited for use in England, Wales and Northern Ireland as a Cambridge International Level 1/Level 2 Certificate.This document consists of 9 printed pages and 1 blank page.© UCLES 2014[Turn overPMT2 1 You are going to investigate the reaction between excess magnesium and two different dilute acids, X and Y. Read all the instructions below carefully before starting the experiments. Instructions You are going to carry out two experiments. (a) Experiment 1 Set up the apparatus as shown in the diagram below.rubber connector stand and clampbunginverted 100 cm3 measuring cylinderconical flask watertroughRemove the bung from the conical flask and move the measuring cylinder away from the delivery tube without letting any water run out. Twist one of the strips of magnesium to break it into four pieces and place all four pieces into the conical flask. Using a different measuring cylinder, measure 50 cm3 of dilute acid X. Pour it into the conical flask and replace the bung firmly. Place the measuring cylinder back over the delivery tube and start the timer. In the table, record the volume of gas collected in the measuring cylinder every 30 seconds for three minutes. time / s volume of gas / cm3 [2] (b) Experiment 2 Repeat the whole of Experiment 1 using 50 cm3 of dilute acid Y. In the table, record the volume of gas collected in the measuring cylinder every 30 seconds for three minutes. time / s volume of gas / cm3 [2] 0 30 60 90 120 150 180 0 30 60 90 120 150 180© UCLES 20140620/05/SP/16PMT3 (c) Plot the results you have obtained for both experiments on the grid below. For each set of results, draw a smooth line graph. Indicate clearly which line represents Experiment 1 and which line represents Experiment 2.[4] (d) State which experiment had the faster rate of reaction and suggest why the rate was faster in this experiment.[1] (e) From your graph, deduce the time required to collect 25 cm3 of gas in Experiment 1. Show clearly on the graph how you worked out your answer. [1]© UCLES 20140620/05/SP/16[Turn overPMT4 (f) The rate of this reaction can be calculated using:rate =volume of gas / cm 3 time taken / sFor the experiment with the higher rate, calculate the rate of reaction for the first 30 seconds of the reaction. Deduce the units.rate[2](g) A student suggested that the magnesium should be rubbed with sandpaper before starting the experiment. Explain why the magnesium should be rubbed with sandpaper.[2](h) Give one advantage and one disadvantage of using a measuring cylinder to add the acids to the flask. advantage disadvantage [2](i) Suggest and explain one improvement to this experiment.[1][Total: 17]© UCLES 20140620/05/SP/16PMT5 BLANK PAGE© UCLES 20140620/05/SP/16[Turn overPMT6 2 You are provided with a mixture of two solids, C and D. Solid C is water-soluble and D is insoluble in water. Carry out the following tests on C and D, recording all of your observations at each stage. Add 15 cm3 of distilled water to the mixture in the boiling tube. Stopper and shake the boiling tube for two minutes. Filter the contents of the tube, keeping the filtrate and residue for the following tests. tests on the filtrate (a) (i) To about 1 cm3 of the solution, add a few drops of aqueous sodium hydroxide. observation (ii) Now add excess aqueous sodium hydroxide to the mixture. observation (b) To about 1 cm3 of the solution add an equal volume of aqueous ammonia. observation (c) To about 1 cm3 of the solution add excess aqueous sodium hydroxide. Now add a small piece of aluminium foil and warm the mixture carefully. Test any gases given off. observation [2] [1] [1] [1](d) Identify solid C. [2]tests on the residue Wash the residue in the filter paper with a little distilled water. Using a spatula, transfer some of the solid residue from the filter paper into two test-tubes. (e) Heat the solid in the first test-tube gently and then strongly. Leave the test-tube to cool. observation [2]© UCLES 20140620/05/SP/16PMT7 (f) (i) Add about 2 cm3 of dilute hydrochloric acid to the second test-tube. Test any gases given off. Keep this liquid for (f)(ii). observation [2] (ii) After two minutes, add an equal volume of distilled water and shake the test-tube. Decant off the liquid and divide the liquid into two approximately equal portions. To the first portion add aqueous sodium hydroxide a little at a time until in excess. observation [2] (iii) To the second portion add aqueous ammonia a little at a time until in excess. observation [2](g) Identify solid D?[2] [Total: 17]© UCLES 20140620/05/SP/16[Turn overPMT8 3 E-numbers identify chemicals which are added to foods. (a) E210 is benzoic acid. How could you show that a solution of benzoic acid is a weak acid? test result [2](b) E110 is Sunset Yellow. Outline a method you could use to show the presence of E110 in a food colouring. You may draw a diagram to help answer the question.[4] [Total: 6]© UCLES 20140620/05/SP/16PMT9 NOTES FOR USE IN QUALITATIVE ANALYSIS Test for anions anion carbonate (CO32–) chloride (Cl –) [in solution] bromide (Br –) [in solution] iodide (I–) [in solution] nitrate (NO3–) [in solution] sulfate (SO42–) [in solution] sulfite (SO32–) test add dilute acid acidify with dilute nitric acid, then add aqueous silver nitrate acidify with dilute nitric acid, then add aqueous silver nitrate acidify with dilute nitric acid, then add aqueous silver nitrate add aqueous sodium hydroxide then aluminium foil; warm carefully acidify, then add aqueous barium nitrate add dilute hydrochloric acid, warm gently and test for the presence of sulfur dioxide test result effervescence, carbon dioxide produced white ppt. cream ppt. yellow ppt. ammonia produced white ppt. sulfur dioxide produced will turn acidified aqueous potassium manganate(VII) from purple to colourlessTest for aqueous cations cation aluminium (Al 3+) ammonium (NH4+) calcium (Ca2+) chromium(III) (Cr3+) copper (Cu2+) iron(II) (Fe2+) iron(III) (Fe3+) zinc (Zn2+) effect of aqueous sodium hydroxide white ppt., soluble in excess giving a colourless solution ammonia produced on warming white ppt., insoluble in excess green ppt., soluble in excess light blue ppt., insoluble in excess green ppt., insoluble in excess red-brown ppt., insoluble in excess white ppt., soluble in excess giving a colourless solution effect of aqueous ammonia white ppt., insoluble in excess – no ppt., or very slight white ppt. grey-green ppt., insoluble in excess light blue ppt., soluble in excess, giving a dark blue solution green ppt., insoluble in excess red-brown ppt., insoluble in excess white ppt., soluble in excess, giving a colourless solution© UCLES 20140620/05/SP/16PMT10 Test for gases gas ammonia (NH3) carbon dioxide (CO2) chlorine (Cl 2) hydrogen (H2) oxygen (O2) sulfur dioxide (SO2) test and test results turns damp, red litmus paper blue turns limewater milky bleaches damp litmus paper ‘pops’ with a lighted splint relights a glowing splint turns acidified aqueous potassium manganate(VII) from purple to colourless Flame tests for metal ions metal ion lithium (Li+) sodium (Na+) potassium (K+) copper(II) (Cu2+) flame colour red yellow lilac blue-greenPermission to reproduce items where third-party owned material protected by copyright is included has been sought and cleared where possible. Every reasonable effort has been made by the publisher (UCLES) to trace copyright holders, but if any items requiring clearance have unwittingly been included, the publisher will be pleased to make amends at the earliest possible opportunity. Cambridge International Examinations is part of the Cambridge Assessment Group. Cambridge Assessment is the brand name of University of Cambridge Local Examinations Syndicate (UCLES), which is itself a department of the University of Cambridge.© UCLES 20140620/05/SP/16。

九天国际教育GCSE真题November 2010 (v3) QP - Paper 5 CIE Chemistry IGCSE

READ THESE INSTRUCTIONS FIRSTWrite your Centre number, candidate number and name on all the work you hand in.Write in dark blue or black pen.You may use a pencil for any diagrams, graphs or rough working.Do not use staples, paper clips, highlighters, glue or correction ﬂ uid.DO NOT WRITE IN ANY BARCODES.Answer all questions.Practical notes are provided on page 8.At the end of the examination, fasten all your work securely together.The number of marks is given in brackets [ ] at the end of each question or part question.CHEMISTRY0620/53Paper 5 Practical TestOctober/November 20101 hour 15 minutesCandidates answer on the Question Paper.Additional Materials:As listed in the Con ﬁdential InstructionsUNIVERSITY OF CAMBRIDGE INTERNATIONAL EXAMINATIONS International General Certi ﬁ cate of Secondary EducationThis document consists of 6 printed pages and 2blank pages.[Turn overIB10 11_0620_53/3RP © UCLES 2010*3216989122*For Examiner’s Use Total12For Examiner’sUse1Y ou are going to investigate what happens when dilute hydrochloric acid reacts with two different alkaline solutions, F and G .R ead all instructions below carefully before starting the experiments. I nstructions Y ou are going to carry out two experiments. (a) E xperiment 1 Fill the burette with the dilute hydrochloric acid provided to the 0.0 cm 3 mark.U sing a measuring cylinder, pour 25 cm 3 of solution F into a conical ﬂ ask. Add 4 to 6drops of phenolphthalein indicator to the conical ﬂ ask.A dd the hydrochloric acid from the burette 1 cm 3 at a time while shaking the ﬂ ask. When the colour of the phenolphthalein changes, record in the table the volume of acid added.(b) E xperiment 2 Fill the burette with dilute hydrochloric acid to the 0.0 cm 3 mark.E mpty the conical ﬂ ask and rinse it with water. Using a measuring cylinder, pour 25 cm 3of solution G into the conical ﬂ ask. Add 4 to 6 drops of phenolphthalein to the conical ﬂ ask.A dd the hydrochloric acid from the burette 1 cm 3 at a time while shaking the ﬂask. When the colour of the phenolphthalein changes, record in the table the volume of acid added.experimentsolution volume of hydrochloric acidadded / cm 31F 2G[4]ForExaminer’sUse(c) W hat colour change was observed when hydrochloric acid was added to the conicalﬂ ask?from ....................................................... to .......................................................[2](d) (i) W hich ion is present in all alkaline solutions? (1)(ii) W hat type of chemical reaction occurs when hydrochloric acid reacts with alkalinesolutions? (1)(e) (i) I n which Experiment was the greatest volume of hydrochloric acid used? (1)(ii) C ompare the volumes of hydrochloric acid used in Experiments 1 and 2. (1)(iii) S uggest an explanation for the difference in volumes..................................................................................................................................... .................................................................................................................................... (2)(f) I f Experiment 2 were repeated using 12.5 cm 3 of solution G , what volume of hydrochloricacid would be used? Explain your answer............................................................................................................................................ (2)(g) (i) S tate two sources of error in the experiments.1 ................................................................................................................................. 2 (2)(ii) S uggest two improvements to reduce the sources of error in the experiments.1 ................................................................................................................................. 2 (2)[Total: 18]ForExaminer’sUse2 Y ou are provided with two different salts, W and X . C arry out the following tests on each salt, recording all of your observations in the table. Conclusions must not be written in the table.testsobservationstests on solid W(a) D escribe the appearance of solid W . (1)(b) P lace half of solid W in a test-tube.Heat the test-tube gently . Test any gas given off with damp pH indicator paper (2)(c) A dd the rest of solid W to about 6 cm 3 of distilled water in a test-tube. C ork the test-tube and shake thecontents until dissolved. D ivide the solution into 3 equalportions in test-tubes and carry out the following tests.(i) A dd about 1 cm 3 of dilutehydrochloric acid to the ﬁ rst portion of the solution and then add aqueous barium chloride. (ii) A dd about 1 cm 3 of dilute nitric acid to the second portion ofthe solution and then add silver nitrate solution. (iii) T o the third portion of the solutionadd about 1 cm 3 of aqueoussodium hydroxide. Heat the mixture gently and test any gasesgiven off with damp pH indicator paper............................................................................................................................................................. [2]........................................................................... [1] (2)ForExaminer’sUsetestsobservationstests on solid X(d) R epeat experiment (b) using abouthalf of the solid X . Leave the test-tube and contents to cool. This will be used in test (f) (2)(e) D issolve the rest of solid X inabout 4 cm 3 of distilled water in a test-tube. Divide the solution into 3 equal portions in test-tubes and carry out the following tests.(i) T o the ﬁ rst portion, add excessaqueous sodium hydroxide. (ii) T o the second portion, add afew drops of hydrochloric acid, followed by aqueous barium chloride. (iii) T o the third portion, add aqueous potassium manganate(VII ) drop by drop............................................................................................................................................................. [2]........................................................................... [1] (1)(f) U sing a teat pipette, add drops of cold water to the test-tube and contents from test (d)............................................................................................................................................................. [2] (g) I dentify the gas given off in test (b)...................................................................................................................................... [1] (h) W hat conclusions can you draw about solid W ?........................................................................................................................................... ..................................................................................................................................... [2] (i) I dentify solid X ............................................................................................................................................ ........................................................................................................................................... (3)[Total: 22]Permission to reproduce items where third-party owned material protected by copyright is included has been sought and cleared where possible. Every reasonable effort has been made by the publisher (UCLES) to trace copyright holders, but if any items requiring clearance have unwittingly been included the publisher will be pleased to make amends at the earliest possible opportunity.University of Cambridge International Examinations is part of the Cambridge Assessment Group. Cambridge Assessment is the brand name of University of Cambridge Local Examinations Syndicate (UCLES), which is itself a department of the University of Cambridge.NOTES FOR USE IN QUALITATIVE ANALYSISTest for anions aniontesttest resultcarbonate (CO 32–)add dilute acideffervescence, carbon dioxide produced chloride (C l –)[in solution]acidify with dilute nitric acid, then add aqueous silver nitrate white ppt.iodide (I –)[in solution]acidify with dilute nitric acid, then add aqueous silver nitrate yellow ppt.nitrate (NO 3–)[in solution]add aqueous sodium hydroxide then aluminium foil; warm carefully ammonia produced sulfate (SO 42–)[in solution]acidify with dilute nitric acid, then aqueous barium nitratewhite ppt.Test for aqueous cations cationeffect of aqueous sodium hydroxide effect of aqueous ammonia aluminium (A l 3+)white ppt., soluble in excess giving a colourless solutionwhite ppt., insoluble in excess ammonium (NH 4+)ammonia produced on warming –calcium (Ca 2+)white ppt., insoluble in excess no ppt., or very slight white ppt.copper (Cu 2+)light blue ppt., insoluble in excess light blue ppt., soluble in excess giving a dark blue solution iron(II ) (Fe 2+)green ppt., insoluble in excess green ppt., insoluble in excess iron(III ) (Fe 3+)red-brown ppt., insoluble in excess red-brown ppt., insoluble in excess zinc (Zn 2+)white ppt., soluble in excess giving a colourless solutionwhite ppt., soluble in excess giving a colourless solutionTest for gases gastest and test resultsammonia (NH 3)turns damp red litmus paper blue carbon dioxide (CO 2)turns limewater milky chlorine (C l 2)bleaches damp litmus paper hydrogen (H 2)‘pops’ with a lighted splint oxygen (O 2)relights a glowing splint。

九天国际教育GCSE真题November 2016 (v3) QP - Paper 4 CIE Chemistry IGCSE

READ THESE INSTRUCTIONS FIRSTWrite your Centre number, candidate number and name on all the work you hand in.Write in dark blue or black pen.You may use an HB pencil for any diagrams or graphs.Do not use staples, paper clips, glue or correction fluid.DO NOT WRITE IN ANY BARCODES.Answer all questions.Electronic calculators may be used.A copy of the Periodic Table is printed on page 12.You may lose marks if you do not show your working or if you do not use appropriate units.At the end of the examination, fasten all your work securely together.The number of marks is given in brackets [ ] at the end of each question or part question.CHEMISTRY0620/43Paper 4 Theory (Extended)October/November 20161 hour 15 minutesCandidates answer on the Question Paper.No Additional Materials are required.Cambridge International ExaminationsCambridge International General Certificate of Secondary EducationThis document consists of 12 printed pages.[Turn overIB16 11_0620_43/4RP © UCLES 2016The syllabus is approved for use in England, Wales and Northern Ireland as a Cambridge International Level 1/Level 2 Certificate.0620/43/O/N/16© UCLES 20161(a) C omplete the table.particle charge relative massproton +1neutron 1electron[2](b) T he following are isotopes of carbon.C 126 C 136 C146 (i) I n terms of numbers of protons, neutrons and electrons, how are these three isotopes thesame and how are they different?T hey are the same because ............................................................................................... .............................................................................................................................................T hey are different because ................................................................................................. .............................................................................................................................................[3] (ii) W hy do all isotopes of carbon have the same chemical properties? (1)(c) N ame two forms of the element carbon which have giant covalent structures............................................................... and ........................................................................ [1] (d) C omplete the diagram to show the electron arrangement in a carbon dioxide molecule.S how the outer shell electrons only.O CO[2][Total: 9]2B eryllium is a metallic element in Group II.(a)G ive the electronic structure of a beryllium atom. (1)(b)G ive the formula of beryllium oxide. (1)(c)(i) D escribe the bonding in a metallic element such as beryllium.I nclude a labelled diagram and any appropriate charges in your answer........................................................................................................................................................................................................................................................................................... (3)(ii)E xplain why metallic elements, such as beryllium, are good conductors of electricity.............................................................................................................................................. (1)(d)B eryllium hydroxide is amphoteric.B eryllium hydroxide reacts with acids. The salts formed contain positive beryllium ions.(i)G ive the formula of the positive beryllium ion. (1)(ii)W rite a chemical equation for the reaction between beryllium hydroxide and hydrochloric acid. (2)(iii)B eryllium hydroxide also reacts with alkalis. The salts formed contain beryllate ions, BeO2–.2S uggest a chemical equation for the reaction between beryllium hydroxide andsodium hydroxide solution. (2)[Total: 11]© UCLES 2016[Turn over0620/43/O/N/163W hen lead(II) nitrate is heated, two gases are given off and solid lead(II) oxide remains.T he equation for the reaction is shown.2Pb(NO3)2(s) → 2PbO(s) + 4NO2(g) + O2(g)(a)C alculate the Mrof lead(II) nitrate. (1)(b)6.62 g of lead(II) nitrate are heated until there is no further change in mass.(i)C alculate the mass of lead(II) oxide produced............................ g [2](ii)C alculate the volume of oxygen, O2, produced at room temperature and pressure (r.t.p.)............................ dm3 [2](c)D escribe a test for oxygen.t est .............................................................................................................................................r esult ..........................................................................................................................................[2]0620/43/O/N/16© UCLES 2016(d)L ead(II) oxide is insoluble. A student adds solid lead(II) oxide to dilute nitric acid until thelead(II) oxide is in excess. Aqueous lead(II) nitrate and water are produced.(i)W hat is meant by the term excess? (1)(ii)H ow would the student know when the lead(II) oxide is in excess? (1)(iii)W rite a chemical equation for the reaction. (1)[Total: 10]© UCLES 2016[Turn over0620/43/O/N/164S ilicon(IV) oxide and sodium chloride have different types of bonding and structure.(a)N ame the type of bonding present ins ilicon(IV) oxide, .......................................................................................................................s odium chloride. ........................................................................................................................[2](b)N ame the type of structure present in silicon(IV) oxide. (1)(c) (i)S ilicon(IV) oxide has a high melting point. Explain why.............................................................................................................................................. (2)(ii)S ilicon(IV) oxide is a poor conductor of electricity. Explain why. (1)(d)S olid sodium chloride does not conduct electricity. However, it conducts electricity when molten.E xplain why solid sodium chloride does not conduct electricity, whereas molten sodium chloridedoes conduct electricity............................................................................................................................................................................................................................................................................................................................................................................................................................................................. (3)(e)A concentrated aqueous solution of sodium chloride is electrolysed using carbon electrodes.(i)N ame the products formed at the electrodes.p roduct at the positive electrode (anode) ...........................................................................p roduct at the negative electrode (cathode) .......................................................................[2](ii)W rite an ionic half-equation for the reaction occurring at the negative electrode. (1)© UCLES 20160620/43/O/N/16(f)A dilute aqueous solution of sodium chloride is electrolysed using carbon electrodes.N ame the main product formed at the positive electrode. (1)(g)M olten sodium chloride is electrolysed using carbon electrodes.(i)N ame the product formed at the negative electrode. (1)(ii)Write an ionic half-equation for the reaction occurring at the negative electrode. (1)(iii)C hlorine is produced at the positive electrode.G ive the test for chlorine.test ......................................................................................................................................result ...................................................................................................................................[2][Total: 17]© UCLES 2016[Turn over0620/43/O/N/165S ulfuric acid can be manufactured from the raw materials sulfur, air and water. The process can be divided into four stages.s tage 1converting sulfur into sulfur dioxides tage 2converting sulfur dioxide into sulfur trioxides tage 3converting sulfur trioxide into oleum, H2S2O7s tage 4converting oleum into sulfuric acidstage 1(a) (i)D escribe how sulfur is converted into sulfur dioxide. (1)(ii)W rite a chemical equation for the conversion of sulfur into sulfur dioxide. (1)stage 2(b)S ulfur dioxide is converted into sulfur trioxide according to the following equation.2SO2 + O22SO3T he reaction is carried out at a temperature of 450 °C and a pressure of 1–2 atmospheres using a catalyst. The energy change, ∆H, for the reaction is –196 kJ / mol.(i)W hat is the meaning of the symbol ? (1)(ii)N ame the catalyst used in this reaction. (1)(iii)W hy is a catalyst used? (1)(iv)I f a temperature higher than 450 °C were used, what would happen to the amount of sulfur trioxide produced? Give a reason for your answer.............................................................................................................................................. (2)(v)S uggest a reason why a temperature lower than 450 °C is not used.............................................................................................................................................. (1)0620/43/O/N/16© UCLES 2016(vi)I f a pressure higher than 1–2 atmospheres were used, what would happen to the amount of sulfur trioxide produced? Give a reason for your answer.............................................................................................................................................. (2)stage 3(c) (i)W hat is added to sulfur trioxide to convert it into oleum? (1)(ii)W rite a chemical equation for the conversion of sulfur trioxide into oleum. (1)stage 4(d) (i)W hat is added to oleum to convert it into sulfuric acid? (1)(ii)W rite a chemical equation for the conversion of oleum into sulfuric acid. (1)(e)G ive one use of sulfuric acid. (1)(f)S ulfuric acid reacts with a hydrocarbon called benzene to produce benzenesulfonic acid,C6H5SO3H. Benzenesulfonic acid is a strong acid which ionises to produce hydrogen ions, H+,and benzenesulfonate ions, C6H5SO3–.(i)W hat is meant by the term strong acid? (1)(ii)D escribe how to show that a 1 mol / dm3 solution of benzenesulfonic acid is a strong acid.............................................................................................................................................. (2)(iii)W rite a chemical equation for the reaction between benzenesulfonic acid andsodium carbonate, Na2CO3. (2)[Total: 20]0620/43/O/N/16© UCLES 2016[Turn over0620/43/O/N/16© UCLES 20166 S ynthetic polyamides are made by condensation polymerisation. (a) (i) W hat is meant by the term condensation polymerisation ?............................................................................................................................................. ............................................................................................................................................. ....................................................................................................................................... [3] (ii) Name another type of polymerisation. (1)(b) O ne repeat unit of a synthetic polyamide is represented by the following structure.(i) D raw a ring around the amide link.[1](ii) C omplete the diagrams to show the structures of the monomers used to produce thesynthetic polyamide. Show all the missing atoms and bonds.[2](iii) N ame an example of a synthetic polyamide. (1)(c) P roteins and synthetic polyamides have similarities and differences.(i) N ame the type of compounds that are the monomers used to make up proteins. (1)110620/43/O/N/16© UCLES 2016Permission to reproduce items where third-party owned material protected by copyright is included has been sought and cleared where possible. Every reasonableeffort has been made by the publisher (UCLES) to trace copyright holders, but if any items requiring clearance have unwittingly been included, the publisher will be pleased to make amends at the earliest possible opportunity.To avoid the issue of disclosure of answer-related information to candidates, all copyright acknowledgements are reproduced online in the Cambridge International Examinations Copyright Acknowledgements Booklet. This is produced for each series of examinations and is freely available to download at after the live examination series.Cambridge International Examinations is part of the Cambridge Assessment Group. Cambridge Assessment is the brand name of University of Cambridge Local Examinations Syndicate (UCLES), which is itself a department of the University of Cambridge.(ii) S tarting with a sample of protein, describe how to produce, separate, detect and identifythe monomers which make it up.Your answer should include • t he name of the process used to break down the protein into its monomers, • t he name of the process used to separate the monomers, • t he method used to detect the monomers after they have been separated, • t he method used to identify the monomers after they have been separated.............................................................................................................................................. ............................................................................................................................................. ............................................................................................................................................. ............................................................................................................................................. (4)[Total: 13]PMT120620/43/O/N/16© UCLES 2016G r o u pT h e P e r i o d i c T a b l e o f E l e m e n t s1Hh y d r o g e n12H eh e l i u m4I I I I I II V V V I V I I V I I I3L il i t h i u m 74B eb e r y l l i u m 9a t o m ic n u m b e ra t o m i c s y mb o l K e yn a m er e l a t i v e a t o m i c m a s s 11N as o d i u m 2312M gm a g n e s i u m2419Kp o t a s s i u m 3920C ac a l c i u m 4037R br u b i d i u m 8538S rs t r o n t i u m 8855C sc a e s i u m 13356B ab a r i u m 13787F rf r a n c i u m –88R ar a d i u m –5B b o r o n 1113A l a l u m i n i u m 2731G a g a l l i u m7049I ni n d i u m11581T lt h a l l i u m2046C c a r b o n 1214S i s i l i c o n2832G eg e r m a n i u m7350S nt i n11982P bl e a d20722T i t i t a n i u m 4840Z r z i r c o n i u m 9172H f h a f n i u m 178104R f r u t h e r f o r d i u m –23V v a n a d i u m5141N b n i o b i u m9373T a t a n t a l u m181105D b d u b n i u m–24C r c h r o m i u m 5242M o m o l y b d e n u m 9674W t u n g s t e n 184106S g s e a b o r g i u m –25M n m a n g a n e s e 5543T c t e c h n e t i u m –75R e r h e n i u m 186107B h b o h r i u m –26F e i r o n 5644R u r u t h e n i u m 10176O so s m i u m 190108H s h a s s i u m –27C o c o b a l t 5945R h r h o d i u m 10377I r i r i d i u m 192109M t m e i t n e r i u m –28N i n i c k e l 5946P d p a l l a d i u m 10678P t p l a t i n u m 195110D s d a r m s t a d t i u m–29C u c o p p e r 6447A g s i l v e r 10879A ug o l d197111R gr o e n t g e n i u m–30Z n z i n c 6548C dc ad m i u m11280H gm e r c u r y201112C nc o p e r n i c i u m–114F lf l e r o v i u m–116L vl i v e r m o r i u m–7N n i t r o g e n1415Pp h o s p h o r u s3133A sa r s e n i c7551S ba n t i m o n y12283B ib i s m u t h2098Oo x y g e n1616Ss u l f u r3234S es e l e n i u m7952T et e l l u r i u m12884P op o l o n i u m–9Ff l u o r i n e1917C lc h l o r i n e35.535B rb r o m i n e8053Ii o d i n e12785A ta s t a t i n e–10N en e o n2018A ra r g o n4036K rk r y p t o n8454X ex e n o n13186R nr a d o n–21S c s c a n d i u m 4539Y y t t r i u m 8957–71l a n t h a n o i d s89–103a c t i n o i d s57L al a n t h a n u m 13989A cl a n t h a n o i d sa c t i n o i d sT h e v o l u m e o f o n e m o l e o f a n y g a s i s 24 d m 3 a t r o o m t e m p e r a t u r e a n d p r e s s u r e (r .t .p .).a c t i n i u m –58C e c e r i u m 14090T h t h o r i u m 23259P r p r a s e o d y m i u m14191P a p r o t a c t i n i u m23160N d n e o d y m i u m 14492U u r a n i u m 23861P m p r o m e t h i u m –93N p n e p t u n i u m–62S m s a m a r i u m15094P up l u t o n i u m–63E ue u r o p i u m15295A ma m e r i c i u m–64G dg a d o l i n i u m15796C mc u r i u m–65T bt e r b i u m15997B kb e r k e l i u m–66D yd y s p r o s i u m16398C fc a l i f o r n i um–67H oh o l m i u m16599E se i n s t e i n i u m–68E re r b i u m167100F mf e r m i u m–69T mt h u l i u m169101M dm e n d e l e v i u m–70Y by t t e r b i u m173102N on o b e l i u m–71L ul u t e t i u m175103L rl a w r e n c i u m–PMT。

九天国际教育GCSE真题June 2016 QP - Unit 2 (F) OCR Chemistry (A) GCSE

*5988893363*INSTRUCTIONS TO CANDIDATES •Write your name, centre number and candidate number in the boxes above. Please write clearly and in capital letters.• Use black ink. HB pencil may be used for graphs and diagrams only.• Answer all the questions.• Read each question carefully. Make sure you know what you have to do before startingyour answer.• Write your answer to each question in the space provided. If additional space is required,you should use the lined page(s) at the end of this booklet. The question number(s) must be clearly shown.• Do not write in the bar RMATION FOR CANDIDATES • The quality of written communication is assessed in questions marked with a pencil ( ).• The number of marks is given in brackets [ ] at the end of each question or part question.• The total number of marks for this paper is 60.• This document consists of 20 pages. Any blank pages are indicated.• A list of qualitative tests for ions is printed on page 2.•The Periodic T able is printed on the back page.OCR is an exempt CharityTurn over© OCR 2016 [R/601/7592]DC (CW/JG) 124559/1© OCR 2016TWENTY FIRST CENTURY SCIENCE DATA SHEETQualitative analysisTests for ions with a positive chargeIonTestObservationcalcium Ca 2+add dilute sodium hydroxidea white precipitate forms; the precipitate does not dissolve in excess sodium hydroxide copper Cu 2+add dilute sodium hydroxidea light blue precipitate forms; the precipitate does not dissolve in excess sodium hydroxide iron(II )Fe 2+add dilute sodium hydroxidea green precipitate forms; the precipitate does not dissolve in excess sodium hydroxide iron(III )Fe 3+add dilute sodium hydroxidea red-brown precipitate forms; the precipitate does not dissolve in excess sodium hydroxide zinc Zn 2+add dilute sodium hydroxidea white precipitate forms; the precipitate dissolves in excess sodium hydroxideTests for ions with a negative chargeIonTestObservationcarbonate CO 32−add dilute acidthe solution effervesces; carbon dioxide gas is produced (the gas turns lime water from colourless to milky)chloride C l −add dilute nitric acid,then add silver nitrate a white precipitate forms bromide Br −add dilute nitric acid,then add silver nitrate a cream precipitate forms iodide I −add dilute nitric acid,then add silver nitrate a yellow precipitate formssulfate SO 42−add dilute acid,then add barium chloride or barium nitratea white precipitate formsAnswer all the questions.1 In 1864, a chemist called John Newlands had an idea of arranging the elements in order,depending on their chemical properties.He called his idea the ‘Law of Octaves’.(a)Newlands put elements with similar properties together.He put lithium, sodium and potassium together.Gi v e two ways that the properties of lithium, sodium and potassium are similar.......................................................................................................................................................................................................................................................................................................................................................................................................................................................... (2)(b)The table shows Newlands’ arrangement of some of the elements.He put elements with similar properties into the same row of his table.Row1H F C l2Li Na K3G l Mg Ca4Bo A l Cr5 C Si Ti6N P Mn7O S FeNewlands based the order of the elements on their relative atomic masses.(i) Find the relative atomic masses for the elements in Row 1 of Newlands’ table.Use the Periodic Table on page 20 to help you.Relative atomic masses H ....................... F ....................... C l .. (1)(ii) Use your answer to describe the trend in relative atomic masses across Row 1............................................................................................................................................ (1)Turn over © OCR 2016(iii) The Periodic Table that is used today was developed after Newlands’ table.In Newlands’ table, the elements H, F and C l are all together in Row 1.In the Periodic Table, these elements are not all together in the same group.Where are these elements placed in the Periodic Table?................................................................................................................................................................................................................................................................................................................................................................................................................................. (2)(iv) One group of elements on the Periodic Table is completely missing from Newlands’ table.Which group is completely missing?Use the Periodic T able to help you.Put a ring around the correct answer.Group 4 Group 5 Group 6 Group 0[1] (v) What is the most likely reason for Newlands missing these elements out of his table?Put a tick (✓) in the box next to the best answer.He only wanted to classify a few elements.These elements were not discovered at the time.He did not know the symbols for these elements.These elements do not have a relative atomic mass.[1](vi) The symbols that Newlands used for some of the elements are different to those used today.Complete the table to show the symbols used today for elements G l and Bo.Use the Periodic T able to help you.Newlands’ symbol Relative atomic mass Symbol used todayG l9Bo11[2]© OCR 2016(c)Newlands’ arrangement was based on putting the elements in order of their relative atomic masses.What decides the order of elements in the Periodic Table today?Put a tick (✓) in the box next to the correct answer.the number of neutrons in the atomtheprotonnumberthe type of bonds the elements formtherelativeatomicmass[1][Total: 11]Turn over© OCR 20162 Joe collects some samples of three minerals, A, B and C.He thinks the minerals contain compounds of Group 1 elements.He looks up the flame colours for some Group 1 elements.Element Flame colourlithium redsodium yellow-orangepotassium pale purplerubidium purpleHe does a flame test on each mineral.These are his results.Mineral Flame colourA yellow-orangeB purpleC greenWrite down what conclusions you can make about which elements each mineral contains and explain why there is not enough information to identify all of the elements in the minerals.The quality of written communication will be assessed in your answer........................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................... (6)[Total: 6]© OCR 20163 The halogens have different colours and states at room temperature.Draw straight lines to connect each element to its correct colour and state at room (a)temperature.colour element stategrey chlorine solidgreen bromine liquidorange iodine gas[3](b)This is the symbol for fluorine on the Periodic T able.19FFluorine9(i) Complete the sentence.The nucleus of a fluorine atom contains 9 protons and 10 (1)(ii) The diagram shows part of the structure of a fluorine atom.Complete the diagram to show the arrangement of electrons.Use x to represent each electron.)[2][Total: 6]Turn over © OCR 20164 The chemical name for common salt is sodium chloride.The information shows the properties and arrangement of particles in solid salt and in salt (a)solution.Explain how the properties of solid salt and salt solution depend on the arrangement and movement of their particles.The quality of written communication will be assessed in your answer............................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................... (6)© OCR 2016Salt is put on roads in winter because it lowers the freezing point of water.(b)Liz does some experiments to investigate whether salt can be used to stop water from freezing in extreme weather conditions.She adds different masses of salt to 100 cm3 of water and records the temperature when the water freezes.Here are her results.Freezing point in °CMass of salt added to100 cm3 water in g0.0 05.0–310.0–615.0–9Liz talks about her results.(i) What is the relationship shown in this data between the mass of salt added and thefreezing point?...................................................................................................................................................................................................................................................................................... (2)(ii) Use the relationship to predict the freezing point when 25.0 g of salt are added.Show your working.Freezing point = .....................................................°C [2]Turn over © OCR 2016(c)Liz does another experiment using 35.0 g of salt.The table shows her resultsFreezing point in °CMass of salt added to100 cm3 water in g35.0–6(i) Liz thinks that this result may be an outlier.Explain why she thinks this............................................................................................................................................ (1)(ii) What should Liz do to check whether this result is an outlier?........................................................................................................................................... (1)(iii) Liz wants to investigate the relationship between mass of salt and the freezing point of water when she adds up to 50.0 g of salt.Describe what experiments she should do.................................................................................................................................................................................................................................................................................................................................................................................................................................. (3)[Total: 15]© OCR 20165 The table gives some information about three substances that are extracted from the Earth.Substance Where found Solubility in water Melting and boiling point graphite rocks does not dissolve very highoxygen atmosphere low solubility below room temperaturepotassium chloride sea very soluble very high(a)Oxygen is found in the atmosphere. Potassium chloride is found in the sea.Use the information to explain why oxygen and potassium chloride are not found in surface rocks....................................................................................................................................................................................................................................................................................................... (2)Complete the table to show the missing formulae and elements in each substance.(b)Substance Formula Elements in substance graphite carbon onlyoxygen oxygen onlypotassium chloride KC l[2][Total: 4]She adds the same amount of each salt to the same amount of water.She measures the maximum temperature change when each salt dissolves.The table shows her results.Salt Temperaturechange in °C Type of energy changelithium chloride+7.0exothermic sodium chloride–0.5endothermic potassium chloride–4.0endothermicComplete and label the energy level diagrams. Compare the changes in temperature and energythat happen when each salt dissolves.progress of reaction for lithium chloride(exothermic)progress of reaction forsodium chloride progress of reaction for potassium chlorideThe quality of written communication will be assessed in your answer........................................................................................................................................................... .......................................................................................................................................................... .......................................................................................................................................................... .......................................................................................................................................................... .......................................................................................................................................................... .......................................................................................................................................................... .......................................................................................................................................................... .......................................................................................................................................................... .......................................................................................................................................................... .. (6)[Total: 6]7 Matt finds out about the bonding in some compounds.He dissolves them in water and uses a pH meter to find out if each compound is an acid or an alkali.The table shows his results.Acid or alkali?Compound Bonding incompoundsodium hydroxide ionic alkaliammonia covalent alkalihydrogen chloride covalent acidethanoic acid covalent acidcalcium hydroxide ionic alkaliHow does a pH meter show whether each compound is an acid or an alkali?(a)......................................................................................................................................................................................................................................................................................................................................................................................................................................................... (2)Matt has an idea.(b)Do you agree with Matt’s idea?Use examples from the table to explain your reasoning.......................................................................................................................................................................................................................................................................................................................................................................................................................................................... (2)(c)The pure compounds in the table have different states at room temperature and pressure.They all dissolve in water to form a solution.Draw straight lines to connect each substance to the correct state symbol.symbolsubstance state solid sodium hydroxide(g)hydrogen chloride gas(l)liquid ethanoic acid(s)a solution dissolved in water(aq)[2][Total: 6]8 Silver chloride is a salt that is used to make lenses that darken in bright light.(a)Terry uses silver nitrate to make some silver chloride in a precipitation reaction.This is the symbol equation for the reaction.AgNO3 + NaC l l + NaNO3Use these words to write a word equation for this reaction.sodium chloridesilver chloridesodium nitratesilver nitrate[2](b)In the reaction, silver chloride forms as a precipitate.Terry wants to make a pure, dry sample of silver chloride from the reaction mixture.The diagram shows the apparatus he uses.filter paperovenDescribe how Terry should use this apparatus to make a pure, dry sample of silver chloride.......................................................................................................................................................................................................................................................................................................................................................................................................................................................... (3)The lenses go dark because a solid forms when light shines on silver chloride.(c)The solid is silver metal.What is the name of the other element that forms in the reaction?Put a ring around the correct answer.carbon chlorine hydrogen iodine water[1][Total: 6]END OF QUESTION PAPERADDITIONAL ANSWER SPACEIf additional space is required, you should use the following lined page(s). The question number(s) must be clearly shown in the margin(s). .................................................................................................................................................................. .................................................................................................................................................................. .................................................................................................................................................................. .................................................................................................................................................................. .................................................................................................................................................................. 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RSACopyright InformationOCR is committed to seeking permission to reproduce all third-party content that it uses in its assessment materials. OCR has attempted to identify and contact all copyright holders whose work is used in this paper. To avoid the issue of disclosure of answer-related information to candidates, all copyright acknowledgements are reproduced in the OCR Copyright Acknowledgements Booklet. This is produced for each series of examinations and is freely available to download from our public website () after the live examination series.If OCR has unwittingly failed to correctly acknowledge or clear any third-party content in this assessment material, OCR will be happy to correct its mistake at the earliest possible opportunity.For queries or further information please contact the Copyright Team, First Floor, 9 Hills Road, Cambridge CB2 1GE.OCR is part of the Cambridge Assessment Group; Cambridge Assessment is the brand name of University of Cambridge Local Examinations Syndicate (UCLES), which is itself a department of the University of Cambridge.。

九天国际教育GCSE真题June 2012 QP - Unit 2 (F) OCR Chemistry (A) GCSE

INSTRUCTIONS TO CANDIDATES •Write your name, centre number and candidate number in the boxes above. Please write clearly and in capital letters.• Use black ink. HB pencil may be used for graphs and diagrams only.• Answer all the questions.• Read each question carefully. Make sure you know what you have to do before startingyour answer.• Write your answer to each question in the space provided. Additional paper may beused if necessary but you must clearly show your candidate number, centre number and question number(s).• Do not write in the bar RMATION FOR CANDIDATES • Y our quality of written communication is assessed in questions marked with a pencil ( ).• The number of marks is given in brackets [ ] at the end of each question or part question.• The total number of marks for this paper is 60.• This document consists of 24 pages. Any blank pages are indicated.• The Periodic T able is printed on the back page.•A list of qualitative tests for ions is printed on page 2.OCR is an exempt CharityTurn over© OCR 2012 [R/601/7592]DC (SHW 00678 4/11) 49642/4*A 135360612*© OCR 2012TWENTY FIRST CENTURY SCIENCE DATA SHEETQualitative analysisTests for ions with a positive chargeIonTestObservationcalcium Ca 2+add dilute sodium hydroxidea white precipitate forms; the precipitate does not dissolve in excess sodium hydroxide copper Cu 2+add dilute sodium hydroxidea light blue precipitate forms; the precipitate does not dissolve in excess sodium hydroxide iron(II )Fe 2+add dilute sodium hydroxidea green precipitate forms; the precipitate does not dissolve in excess sodium hydroxide iron(III )Fe 3+add dilute sodium hydroxidea red-brown precipitate forms; the precipitate does not dissolve in excess sodium hydroxide zinc Zn 2+add dilute sodium hydroxidea white precipitate forms; the precipitate dissolves in excess sodium hydroxideTests for ions with a negative chargeIonTestObservationcarbonate CO 32−add dilute acidthe solution effervesces; carbon dioxide gas is produced (the gas turns lime water from colourless to milky)chloride C l −add dilute nitric acid,then add silver nitrate a white precipitate forms bromide Br −add dilute nitric acid,then add silver nitrate a cream precipitate forms iodide I −add dilute nitric acid,then add silver nitrate a yellow precipitate formssulfate SO 42−add dilute acid,then add barium chloride or barium nitratea white precipitate formsBLANK PAGEQuestion 1 begins on page 4PLEASE DO NOT WRITE ON THIS PAGETurn over © OCR 2012Answer all the questions.1 Joe watches a DVD that shows how some Group 7 elements react with iron.Joe makes some notes about what he sees.fluorineF Most reactive element in the group. Explosive reaction with iron.chlorineC l Very bright flame, iron burns away quickly.bromineBr Less bright flame, takes longer for reaction with iron to finish.iodineIastatineAt(a)What do Joe’s notes show about the trend in reactivity down Group 7?................................................................................................................................................... (1)(b)The presenter on the DVD talks about the results of the experiments.(i) Use Joe’s notes to predict the reactivity of iodine and astatine............................................................................................................................................ (2)© OCR 2012(ii) Joe writes this in his notes.I think that these results show that the top element in every groupin the Periodic Table is the most reactive.Do you agree with Joe? Explain your answer.................................................................................................................................................................................................................................................................................................................................................................................................................................. (2)[Total: 5]Turn over© OCR 20122 The table shows data about the physical properties of some elements.Element Appearance atroom temperature Melting pointin °CBoiling pointin °CDoes the elementconduct electricity?Chlorine green gas–101–34noBromine red-brown liquid–7 59noIodine dark grey solid114184noLithium shiny solid1801342yesSodium shiny solid97.8883yesPotassium shiny solid63.5759yesMendeleev put these elements into two groups in the Periodic T able.He used their similarities and differences to put lithium, sodium and potassium in one group.He put chlorine, bromine and iodine into another group.Discuss which data in the table support, and which data do not support, Mendeleev’s idea of organising these elements into the two groups.T he quality of written communication will be assessed in your answer. .......................................................................................................................................................... .......................................................................................................................................................... .......................................................................................................................................................... .......................................................................................................................................................... .......................................................................................................................................................... .......................................................................................................................................................... .......................................................................................................................................................... .......................................................................................................................................................... .......................................................................................................................................................... .. (6)[Total: 6]© OCR 2012Turn over© OCR 20123The diagram shows the arrangement of electrons in an atom of lithium and an atom of fluorine.lithiumfluorine(a) The electron arrangement of the lithium atom is 2.1.What is the electron arrangement of the fluorine atom?electron arrangement = (1)(b) Sodium has eleven electrons.Complete the diagram to show the arrangement of all of the electrons in a sodium atom.sodium[1](c) Another element is in the same group of the Periodic T able as fluorine. It has the electron arrangement 2.8.7. What is the name of this element?Use the Periodic T able to help you.name of element (1)(d) Give the names of the two particles found in the nucleus of an atom...................................................................and . (1)[Total: 4]4 Eve does an experiment with chlorine.She reacts chlorine with a metal. The reaction makes sodium chloride.(a)(i) Write a word equation for the reaction. (2)Before Eve does her experiment, she looks at the hazard warning sign for chlorine gas.(ii)Eve needs to use safety precautions when she uses chlorine in her experiment.Describe these safety precautions and explain why they are necessary............................................................................................................................................ (2)Sea salt contains both sodium chloride and potassium chloride.(b)Which of the following statements about potassium chloride are true and which are false?Put a tick (✓) in the correct box for each statement.true falsePotassium chloride gives a coloured flame in a flame test.Potassium chloride is a gas.Potassium chloride can be made by reacting potassium with bromine.Solid potassium chloride contains sodium ions and chloride ions.[2][Total: 6]© OCR 2012BLANK PAGEQuestion 5 begins on page 10PLEASE DO NOT WRITE ON THIS PAGETurn over © OCR 2012© OCR 20125Amy and Zak test samples of the same solution of a salt.AmyZakThey do tests to identify the positive metal ions and the negative ions in the solution. They use a fresh sample for each test.They both use dilute sodium hydroxide and dilute silver nitrate to test the solution.The boxes show the tests they use and their notes.Amy’s notesTests NotesTest 1Add a few drops of dilute sodium hydroxide.I think thesolution contains calcium ions.Test 2Acidify and add dilute silver nitrate.I think thesolution contains chloride ions.My conclusionThe solution contains calcium chloride .Zak’s notesTests NotesTest 1Add a few drops of dilute sodium hydroxide……then add more dilute sodium hydroxide.I think thesolution contains zinc ions.Test 2Acidify and add dilute silver nitrate.I think thesolution contains chloride ions.My conclusionThe solution contains zinc chloride .Amy and Zak both agree that the salt is a chloride but disagree about the metal ion in the salt. Use the data sheet on page 2 to help you work out what Amy and Zak saw when they did the tests. Explain how what they saw led them to their conclusions and who is more likely to be correct.T he quality of written communication will be assessed in your answer. .......................................................................................................................................................... .......................................................................................................................................................... .......................................................................................................................................................... .......................................................................................................................................................... .......................................................................................................................................................... .......................................................................................................................................................... .......................................................................................................................................................... .......................................................................................................................................................... .......................................................................................................................................................... .. (6)[Total: 6]6 Massicot is a mineral. It contains lead oxide, PbO.Lead metal is extracted from massicot. Lead is needed for roofing and car batteries.Jed and Kay live near a lead mine.The mass of lead that can be extracted from massicot can be worked out using relative atomic (a)masses.(i) Use the Periodic T able to find the relative atomic masses of lead and oxygen.relative atomic mass of lead = .....................relative atomic mass of oxygen = (1)(ii) Use your answers to work out the relative formula mass of lead oxide, PbO.relative formula mass of PbO = (1)The lead mine produces millions of tonnes of lead ore.(b)Jed and Kay are talking about the advantages and disadvantages of living near the lead mine.(i) Kay has just moved into the area. She has a young family.Give one advantage and one disadvantage to Kay of living near a lead mine....................................................................................................................................................................................................................................................................................... (2)(ii) Jed and Kay talk about lead processing at the mine.Suggest reasons that Kay could give for not closing the mine.................................................................................................................................................................................................................................................................................................................................................................................................................................. (2)[Total: 6]7 Aluminium is extracted from its ore by electrolysis.Aluminium ore contains aluminium oxide.(a) This is the word equation for the reaction.aluminium oxidealuminium + oxygenThe aluminium oxide is reduced. What does this mean?Put a tick (✓) in the box next to the correct answer.The aluminium oxide loses oxygen.The density of the aluminium oxide decreases.The aluminium oxide loses energy.The volume of the aluminium oxide decreases.[1](b) The electrolysis process uses molten aluminium oxide.The diagram shows the arrangement of particles in molten aluminium oxide.A l 3+O 2–O 2–O 2–O 2–O 2–O 2–A l 3+A l 3+A l 3+O 2–O 2–O 2–A l 3+A l 3+O 2–O 2–O 2–A l 3+A l 3+A l 3+O 2–O 2–O 2–A l 3+(i) Which two words can be used to describe molten aluminium oxide?Put rings around the two correct answers.covalent gas ionic liquid molecular solid[2](ii) During the electrolysis, negative ions move to the positive electrode and positive ions move to the negative electrode. A product is made at each electrode.Draw straight lines to connect each electrode with the correct product made.electrode product madealuminiumaluminium oxidepositive electrodewaternegative electrodehydrogenoxygen[2]Aluminium has many different uses.(c)The uses of aluminium depend on making the best use of its properties.Draw four straight lines to connect each use with the most important reason for that use.use most important reasonaircraft parts low density and can be mixed with other metals to make it strong power cables shiny appearance and surface can be coloured using dyes drinks and food cans surface is non-toxic and does not react with dilute acids jewellery very good electrical conductivity and can be shaped into wires[2][Total: 7]8Sue reacts copper carbonate with a dilute acid to make copper chloride.dilute acidcopper carbonate(a)Complete the word and symbol equations for the reaction by filling in the empty boxes.copper carbonate+copper chloride+carbon dioxide+CuCO 3+2HClCuC l 2+CO 2+[2](b) Which other chemicals react with the same dilute acid to form copper chloride?Put rings around the two correct answers.copper hydroxide copper nitrate copper oxide copper sulfate[1](c)Sue adds solid copper carbonate to the dilute acid until no more solid reacts.At the end of the experiment, the beaker contains copper chloride solution and some left-over solid copper carbonate.copper chloride solutionsolid copper carbonateHow can Sue make some pure, dry copper chloride crystals from the mixture in the beaker?The quality of written communication will be assessed in your answer............................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................ (6)(d)Sue measures the mass of crystals that she has made (her actual yield).Sue weighs an empty dish.She puts her crystals into the dish and weighs it again.These are her results.mass of empty dish = 200.0 gmass of dish and crystals = 204.5 g(i) What is the mass of the crystals (the actual yield)?mass = ..................................................... g [1] (ii) The theoretical yield for Sue’s experiment is5.0 g.Sue knows thatpercentage yield =actual yield theoretical yield×100%Use the actual yield from part (i) to calculate a percentage yield for Sue’s experiment.percentage yield = .................................................... % [1][Total: 11]9 Alex adds zinc to some dilute sulfuric acid.He measures the volume of hydrogen gas given off every 30 seconds. (a)Draw straight lines to connect each chemical to its correct formula.chemical formulahydrogen H2SO4zinc Znsulfuric acid H2[2](b)What is the name of the salt that forms in the reaction between zinc and sulfuric acid?Put a ring around the correct answer.zinc chloride zinc hydroxide zinc nitrate zinc oxide zinc sulfate[1](c)Alex thinks that the reaction is too slow.He does not want to change the mass of the zinc.Suggest two ways that Alex could make the reaction faster.................................................................................................................................................... (2)(d) Alex measures the volume of hydrogen in the gas syringe for 5 minutes.He plots his results on a graph.50010201234time in minutesvolume ofgas in cm 3(i) Which statement is the best description of what is happening at the start of the reaction?Put a tick (✓) in the box next to the correct answer.No reaction ishappening.The reaction rate is at its fastest.The reaction is slow but getting faster.The reaction is happening at a constant rate.[1](ii) Which statement is the best description of what is happening after 5 minutes?Put a tick (✓) in the box next to the correct answer.The reaction hasstopped.The reaction rate is at its fastest.The reaction is increasing in rate.Gas is being given off at a constant rate.[1](e)Alex measures the pH of the contents of the flask at the start and at the end of the reaction.The pH is very low at the start and increases during the reaction.Why does the pH change in this way?................................................................................................................................................... (2)[Total: 9]END OF QUESTION PAPERBLANK PAGEPLEASE DO NOT WRITE ON THIS PAGEPLEASE DO NOT WRITE ON THIS PAGECopyright InformationOCR is committed to seeking permission to reproduce all third-party content that it uses in its assessment materials. OCR has attempted to identify and contact all copyright holders whose work is used in this paper. T o avoid the issue of disclosure of answer-related information to candidates, all copyright acknowledgements are reproduced in the OCR Copyright Acknowledgements Booklet. This is produced for each series of examinations and is freely available to download from our public website () after the live examination series.If OCR has unwittingly failed to correctly acknowledge or clear any third-party content in this assessment material, OCR will be happy to correct its mistake at the earliest possible opportunity.For queries or further information please contact the Copyright Team, First Floor, 9 Hills Road, Cambridge CB2 1GE.OCR is part of the Cambridge Assessment Group; Cambridge Assessment is the brand name of University of Cambridge Local Examinations Syndicate (UCLES), which is itself a department of the University of Cambridge.T h e P e r i o d i c T a b l e o f t h e E l e m e n t s* T h e l a n t h a n o i d s (a t o m i c n u m b e r s 58-71) a n d t h e a c t i n o i d s (a t o m i c n u m b e r s 90-103) h a v e b e e n o m i t t e d .T h e r e l a t i v e a t o m i c m a s s e s o f c o p p e r a n d c h l o r i n e h a v e n o t b e e n r o u n d e d t o t h e n e a r e s t w h o l e n u m b e r .12345670K e y1H h y d r o g e n 14H eh e l i u m27L il i t h i u m39B eb e r y l l i u m4r e l a t i v e a t o m i c m a s s a t o m i c s y m b o ln a m e a t o m i c (p r o t o n ) n u m b e r 11Bb o r o n512Cc a r b o n614N n i t r o g e n716O o x y g e n819Ff l u o r i n e 920N en e o n1023N as o d i u m1124M gm a g n e s i u m1227A la l u m i n i u m1328S i s i l i c o n1431P p h o s p h o r u s 1532S s u l f u r 1635.5C lc h l o r i n e 1740A ra r g o n1839Kp o t a s s i u m1940C ac a l c i u m2045S cs c a n d i u m2148T it i t a n i u m2251Vv a n a d i u m2352C rc h r o m i u m2455M n m a n g a n e s e 2556F ei r o n2659C o c o b a l t 2759N i n i c k e l 2863.5C uc o p p e r 2965Z n z i n c 3070G ag a l l i u m3173G eg e r m a n i u m 3275A sa r s e n i c 3379S es e l e n i u m 3480B rb r o m i n e 3584K rk r y p t o n3685R br u b i d i u m3788S rs t r o n t i u m3889Yy t t r i u m3991Z rz i r c o n i u m4093N bn i o b i u m4196M om o l y b d e n u m42[98]T c t e c h n e t i u m 43101R ur u t h e n i u m44103R hr h o d i u m 45106P dp a l l a d i u m46108A gs i l v e r 47112C dc ad m i u m48115I ni n d i u m 49119S nt i n50122S ba n t i m o n y51128T et e l l u r i u m52127Ii o d i n e53131X ex e n o n54133C sc a e s i u m55137B ab a r i u m56139L a *l a n t h a n u m57178H fh a f n i u m72181T at a n t a l u m73184Wt u n g s t e n74186R er h e n i u m75190O so s m i u m76192I ri r i d i u m 77195P tp l a t i n u m78197A ug o l d79201H gm e r c u r y 80204T l t h a l l i u m 81207P bl e a d82209B ib i s m u t h83[209]P op o l o n i u m 84[210]A ta s t a t i n e85[222]R nr a d o n86[223]F rf r a n c i u m 87[226]R ar a d i u m 88[227]A c *a c t i n i u m 89[261]R f r u t h e r f o r d i u m104[262]D bd u b n i u m105[266]S gs e a b o r g i u m106[264]B hb o h r i u m 107[277]H sh a s s i u m 108[268]M t m e i t n e r i u m109[271]D sd a r m s t a d t i u m110[272]R g r o e n t g e n i u m111E l e m e n t s w i t h a t o m i c n u m b e r s 112-116 h a v e b e e n r e p o r t e d b u t n o t f u l l y a u t h e n t i c a t e d。

九天国际教育GCSE真题June 2017 (v3) QP - Paper 1 CIE Chemistry IGCSE

The syllabus is approved for use in England, Wales and Northern Ireland as a Cambridge International Level1/Level 2 Certificate.This document consists of 13 printed pages and 3 blank pages.IB17 06_0620_13/3RP © UCLES 2017[Turn over*9908340552*Cambridge International ExaminationsCambridge International General Certificate of Secondary EducationCHEMISTRY 0620/13Paper 1 Multiple Choice (Core)May/June 201745 minutesAdditional Materials: Multiple Choice Answer Sheet Soft clean eraserSoft pencil (type B or HB is recommended)READ THESE INSTRUCTIONS FIRSTWrite in soft pencil.Do not use staples, paper clips, glue or correction fluid.Write your name, Centre number and candidate number on the Answer Sheet in the spaces provided unless this has been done for you.DO NOT WRITE IN ANY BARCODES.There are forty questions on this paper. Answer all questions. For each question there are four possible answers A , B , C and D .Choose the one you consider correct and record your choice in soft pencil on the separate Answer Sheet.Read the instructions on the Answer Sheet very carefully.Each correct answer will score one mark. A mark will not be deducted for a wrong answer. Any rough working should be done in this booklet. A copy of the Periodic Table is printed on page 16. Electronic calculators may be used.© UCLES 2017 0620/13/M/J/171 Diagrams R, S and T represent the three states of matter.TSRWhich change occurs during freezing? A R → S B S → TC T → RD T → S2 A student needs to measure 22 cm3 of water at 40 °C.Which apparatus is required? A beaker and stopwatch B beaker and thermometerC measuring cylinder and stopwatchD measuring cylinder and thermometer3 A compound, X, has a melting point of 71 °C and a boiling point of 375 °C.Which statement about X is correct? A It is a liquid at 52 °C and a gas at 175 °C. B It is a liquid at 69 °C and a gas at 380 °C. C It is a liquid at 75 °C and a gas at 350 °C. D It is a liquid at 80 °C and a gas at 400 °C.4 Which method is used to obtain a concentrated solution of ethanol from a dilute solution of ethanol dissolved in water?A crystallisationB distillationC filtrationD paper chromatography© UCLES 2017 0620/13/M/J/17[Turn over5Which definition of isotopes is correct?A atoms of the same element that have the same number of electrons and nucleonsB atoms of the same element that have the same number of neutrons and protonsC atoms of the same element that have the same number of protons but a different number ofelectrons D atoms of the same element that have the same number of protons but a different number ofnucleons 6Which statement about a molecule of ammonia, NH 3, is correct? A Each hydrogen atom donates a pair of electrons to a nitrogen atom.B There are double covalent bonds between the nitrogen atom and the hydrogen atoms.C There are single covalent bonds between its hydrogen atoms.D There are three shared pairs of electrons in the molecule. 7 The electronic structures of atoms Q and R are shown.Q and R form an ionic compound.What is the formula of the compound? A QR 7 B Q 2R 4C QRD Q 7R8Which substance is a macromolecule? Aammonia B carbon dioxide C diamond D water9 What is the relative formula mass of aluminium oxide, A l 2O 3? A 43B 70C 102D 113© UCLES 2017 0620/13/M/J/1710 Which products are initially obtained at each electrode during the electrolysis of concentratedaqueous sodium chloride?cathode anode A hydrogen chlorine B hydrogen oxygen C sodium chlorine Dsodium oxygen11 Heat energy is produced when hydrocarbons burn in air.Which equations represent this statement?1 C 2H 5OH + 3O2 → 2CO 2 + 3H 2O2 C 2H 4 + 3O 2 → 2CO 2 + 2H 2O3 CH4 + 2O 2 → CO 2 + 2H 2OA 1, 2 and 3B 1 and 2 onlyC 1 and 3 onlyD 2 and 3 only12 Which statements about exothermic and endothermic reactions are correct?1 During an exothermic reaction, heat is given out.2 The temperature of an endothermic reaction goes up because heat is taken in. 3Burning methane in the air is an exothermic reaction.A 1, 2 and 3B1 and2 onlyC 1 and 3 onlyD 2 and 3 only13 Which changes are physical changes?1 melting ice to form water2 burning hydrogen to form water3 adding sodium to water 4boiling water to form steamA 1 and 2B 1 and 4C 2 and 3D 3 and 4© UCLES 2017 0620/13/M/J/17[Turn over14 Which colour change is seen when hydrated cobalt(II ) chloride is heated so that it becomesanhydrous cobalt(II ) chloride?A blue to pinkB blue to whiteC pink to blueD white to blue15 A student was investigating the reaction between marble chips and dilute hydrochloric acid.Which changes slow down the rate of reaction?temperature of acidconcentrationof acidsurface area of marble chipsA decrease decrease decreaseB decrease decrease increaseC increase decrease decreaseD increase increase increase16The reactions shown may occur in the air during a thunder-storm.N2 + O2→ 2NO2NO + O2→ 2NO2NO + O3→ NO2 + O2Which row shows what happens to the reactant molecules in each of these reactions?N2 NO O3A oxidised oxidised oxidisedB oxidised oxidised reducedC reduced reduced oxidisedD reduced reduced reduced17Three separate experiments are carried out on a solution of substance X.1 A gas is produced when X is heated with ammonium chloride.2 Methyl orange is yellow when added to X.3 There is no reaction between X and sodium carbonate.Which type of substance is X?A acidB baseC indicatorD salt18 Farmers spread slaked lime (calcium hydroxide) on their fields to neutralise soils that are tooacidic for crops to grow well.Which ion in slaked lime neutralises the acid in the soil?A Ca2+B H+C O2–D OH–19 Which salt preparation uses a burette and a pipette?A calcium nitrate from calcium carbonate and nitric acidB copper(II) sulfate from copper(II) hydroxide and sulfuric acidC potassium chloride from potassium hydroxide and hydrochloric acidD zinc chloride from zinc and hydrochloric acid© UCLES 2017 0620/13/M/J/17© UCLES 2017 0620/13/M/J/17[Turn over20 Aqueous sodium hydroxide reacts with an aqueous solution of compound Y to give a greenprecipitate.Aqueous ammonia also reacts with an aqueous solution of compound Y to give a greenprecipitate.In each case the precipitate is insoluble when an excess of reagent is added.Which ion is present in Y?A chromium(III )B copper(II )C iron(II )D iron(III )21 Period 3 of the Periodic Table is shown.Na Mg A lSi P S C lArWhat increases from left to right across Period 3? A density B melting pointC non-metallic characterD the number of electron shells22 Which element is less reactive than the other members of its group in the Periodic Table?A astatineB caesiumC fluorineD rubidium23An element has the following properties.●It forms coloured compounds.●It acts as a catalyst.●It melts at 1539°C.In which part of the Periodic Table is the element found?A Group IB Group VIIC Group VIIID transition elements24Why are weather balloons sometimes filled with helium rather than hydrogen?A Helium is found in air.B Helium is less dense than hydrogen.C Helium is more dense than hydrogen.D Helium is unreactive.25 Element E:•forms an alloy•has a basic oxide•is below hydrogen in the reactivity series.What is E?A carbonB copperC sulfurD zinc© UCLES 2017 0620/13/M/J/17© UCLES 2017 0620/13/M/J/17[Turn over26 Which row shows how the metal reacts?metalreacts withdilute acid reacts rapidly withcold waterreacts with steamA calciumB copperC magnesiumDzinc27 Which statement about the extraction of iron from hematite is correct?A Air is blown into the blast furnace to oxidise the molten iron.B Carbon dioxide is reduced by coke to carbon monoxide.C Hematite is oxidised by carbon to molten iron.D The slag produced is denser than molten iron.28 Stainless steel is an alloy of iron and other metals. It is strong and does not rust but it costs muchmore than normal steel.What is not made from stainless steel?A cutleryB pipes in a chemical factoryC railway linesD saucepans29 The diagram shows some uses of water in the home.123For which uses is it important for the water to have been treated? A 1 only B 2 onlyC 3 onlyD 1, 2 and 3© UCLES 2017 0620/13/M/J/1730 Which pollutant gas cannot be produced by the combustion of fossil fuels (coal, petroleum andnatural gas)?A carbon monoxideB methaneC nitrogen dioxideD sulfur dioxide31 A farmer wrongly adds two substances to the soil at the same time.They react together to form a gas which turns damp red litmus blue.What are the two substances?A a basic oxide and a potassium saltB a basic oxide and an ammonium saltC an acidic oxide and a potassium saltD an acidic oxide and an ammonium salt32 In which process is carbon dioxide not formed?A burning of natural gasB fermentationC heating limeD respiration33 Two equations are shown.reaction 1 CaCO 3 → CaO + CO 2reaction 2 CaO + H 2O → Ca(OH)2Which terms describe reactions 1 and 2?reaction 1reaction 2A reduction hydrationB reduction hydrolysisC thermal decomposition hydrationD thermal decompositionhydrolysis34 The structures of three substances are shown.HC HH OHHC HH C HHOHHC HH C HH C HH OHWhy do these substances all belong to the same homologous series? A They are all compounds. B They are all saturated. C They all contain oxygen.D They all contain the same functional group.35 Fuel oil, gasoline, kerosene and naphtha are four fractions obtained from the fractional distillationof petroleum.What is the order of the boiling points of these fractions?highest boiling point → lowest boiling point A fuel oil → kerosene → gasoline→ naphtha B fuel oil → kerosene → naphtha → gasoline C gasoline → naphtha → kerosene → fuel oil Dnaphtha → gasoline → kerosene → fuel oil36 Which process produces alkenes from alkanes?A combustionB crackingC fermentationD polymerisation37 Poly(ethene) is made from ethene.Ethene is ......1...... hydrocarbon because it contains a carbon to carbon ......2...... bond.The general name given to small molecules that undergo polymerisation is ......3...... .Which words complete gaps 1, 2 and 3?1 2 3 A an unsaturated double monomers B an unsaturated single alkenes C a saturated double alkenes Da saturatedsinglemonomers38 Which reaction is used to manufacture ethanol?A reacting ethane with oxygen in the presence of a catalystB reacting ethane with steam in the presence of a catalystC reacting ethene with steam in the presence of a catalystD reacting glucose with steam in the presence of a catalyst39 Which statement about aqueous ethanoic acid is not correct?A It effervesces with sodium carbonate.B It neutralises aqueous sodium hydroxide.C It turns blue litmus from blue to red.D It turns methyl orange from orange to yellow.40 The diagram shows part of the molecule of a polymer.HH C HH C HH C HH C HH C HH C HHC HH C HH CWhich diagram shows the monomer from which this polymer could be manufactured?A B CD HHH C HC HC HH HC H C OH H CC HH H HPermission to reproduce items where third-party owned material protected by copyright is included has been sought and cleared where possible. Every reasonable effort has been made by the publisher (UCLES) to trace copyright holders, but if any items requiring clearance have unwittingly been included, the publisher will be pleased to make amends at the earliest possible opportunity.To avoid the issue of disclosure of answer-related information to candidates, all copyright acknowledgements are reproduced online in the Cambridge International Examinations Copyright Acknowledgements Booklet. This is produced for each series of examinations and is freely available to download at after the live examination series.Cambridge International Examinations is part of the Cambridge Assessment Group. Cambridge Assessment is the brand name of University of Cambridge Local Examinations Syndicate (UCLES), which is itself a department of the University of Cambridge.G r o u pT h e P e r i o d i c T a b l e o f E l e m e n t s1Hh y d r o g e n12H eh e l i u m4I I I I I II V V V I V I I V I I I3L il i t h i u m 74B eb e r y l l i u m 9a t o m ic n u m b e ra t o m i c s y mb o l K e yn a m er e l a t i v e a t o m i c m a s s 11N as o d i u m 2312M gm a g n e s i u m2419Kp o t a s s i u m 3920C ac a l c i u m 4037R br u b i d i u m 8538S rs t r o n t i u m 8855C sc a e s i u m 13356B ab a r i u m 13787F rf r a n c i u m –88R ar a d i u m –5B b o r o n 1113A l a l u m i n i u m 2731G a g a l l i u m 7049I ni n d i u m11581T lt h a l l i u m2046C c a r b o n 1214S i s i l i c o n 2832G e g e r m a n i u m7350S nt i n11982P bl e a d20722T i t i t a n i u m 4840Z r z i r c o n i u m 9172H f h a f n i u m 178104R f r u t h e r f o r d i u m –23V v a n a d i u m5141N b n i o b i u m9373T a t a n t a l u m181105D b d u b n i u m–24C r c h r o m i u m 5242M o m o l y b d e n u m 9674W t u n g s t e n 184106S g s e a b o r g i u m –25M n m a n g a n e s e 5543T c t e c h n e t i u m –75R e r h e n i u m 186107B h b o h r i u m –26F e i r o n 5644R u r u t h e n i u m 10176O so s m i u m 190108H s h a s s i u m –27C o c o b a l t 5945R h r h o d i u m 10377I r i r i d i u m 192109M t m e i t n e r i u m –28N i n i c k e l 5946P d p a l l a d i u m 10678P t p l a t i n u m 195110D s d a r m s t a d t i u m–29C u c o p p e r 6447A g s i l v e r 10879A u g o l d 197111R gr o e n t g e n i u m–30Z n z i n c 6548C dc ad m i u m 11280H gm e r c u r y201112C nc o p e r n i c i u m–114F lf l e r o v i u m–116L vl i v e r m o r i u m–7N n i t r o g e n 1415P p h o s p h o r u s3133A sa r s e n i c7551S ba n t i m o n y12283B ib i s m u t h2098O o x y g e n1616Ss u l f u r3234S es e l e n i u m7952T et e l l u r i u m12884P op o l o n i u m–9Ff l u o r i n e1917C lc h l o r i n e35.535B rb r o m i n e8053Ii o d i n e12785A ta s t a t i n e–10N en e o n2018A ra r g o n4036K rk r y p t o n8454X ex e n o n13186R nr a d o n–21S c s c a n d i u m 4539Y y t t r i u m 8957–71l a n t h a n o i d s89–103a c t i n o i d s57L al a n t h a n u m 13989A cl a n t h a n o i d sa c t i n o i d sT h e v o l u m e o f o n e m o l e o f a n y g a s i s 24 d m 3 a t r o o m t e m p e r a t u r e a n d p r e s s u r e (r .t .p .).a c t i n i u m –58C e c e r i u m 14090T h t h o r i u m 23259P r p r a s e o d y m i u m14191P a p r o t a c t i n i u m23160N d n e o d y m i u m 14492U u r a n i u m 23861P m p r o m e t h i u m –93N p n e p t u n i u m –62S m s a m a r i u m 15094P u p l u t o n i u m–63E u e u r o p i u m15295A ma m e r i c i u m–64G dg a d o l i n i u m15796C mc u r i u m–65T bt e r b i u m15997B kb e r k e l i u m–66D yd y s p r o s i u m16398C fc a l i f o r n i um–67H oh o l m i u m16599E se i n s t e i n i u m–68E re r b i u m167100F mf e r m i u m–69T mt h u l i u m169101M dm e n d e l e v i u m–70Y by t t e r b i u m173102N on o b e l i u m–71L ul u t e t i u m175103L rl a w r e n c i u m–。

九天国际教育GCSE真题June 2016 (v3) QP - Paper 5 CIE Chemistry IGCSE

READ THESE INSTRUCTIONS FIRSTWrite your Centre number, candidate number and name on all the work you hand in.Write in dark blue or black pen.You may use an HB pencil for any diagrams or graphs.Do not use staples, paper clips, glue or correction fluid.DO NOT WRITE IN ANY BARCODES.Answer all questions.Electronic calculators may be used.You may lose marks if you do not show your working or if you do not use appropriate units.Practical notes are provided on pages 11 and 12.At the end of the examination, fasten all your work securely together.The number of marks is given in brackets [ ] at the end of each question or part question.CHEMISTRY0620/53Paper 5 Practical TestMay/June 20161 hour 15 minutesCandidates answer on the Question Paper.Additional Materials:As listed in the Confidential InstructionsCambridge International ExaminationsCambridge International General Certificate of Secondary EducationThis document consists of 9 printed pages and 3 blank pages.[Turn overIB16 06_0620_53/6RP © UCLES 2016The syllabus is approved for use in England, Wales and Northern Ireland as a Cambridge International Level 1/Level 2 Certificate.For Examiner’s Use Total1Y ou are going to investigate what happens when dilute hydrochloric acid and copper(II) sulfate solution react with different metals.R ead all the instructions carefully before starting the experiments.I nstructionsY ou are going to carry out five experiments.(a)E xperiment 1U se a measuring cylinder to pour 10 cm3 of dilute hydrochloric acid into a boiling tube. Put the boiling tube into a rack for support.M easure the temperature of the hydrochloric acid and record it in the table below.A dd 1 g of zinc to the boiling tube and stir the mixture with the thermometer.M easure and record the maximum temperature reached by the mixture. Pour the mixture away and rinse the boiling tube.E xperiment 2R epeat Experiment 1 using 1 g of iron instead of zinc.R ecord your results in the table.E xperiment 3R epeat Experiment 1 using 1 g of magnesium instead of zinc.R ecord your results in the table. Complete the final column in the table.experiment initial temperatureof acid / °Cmaximum temperaturereached / °Ctemperaturerise / °C123[3](b)E xperiment 4U se a measuring cylinder to pour 10 cm3 of copper(II) sulfate solution into a boiling tube.Measure the temperature of the solution and record it in the table on page 3.A dd 1 g of magnesium to the boiling tube and stir the mixture with the thermometer.T est the gas given off with a splint and record your result in the space below. Measure the maximum temperature reached by the mixture and record it in the table. Pour the mixture away and rinse the boiling tube.test .............................................................................................................................................result ..........................................................................................................................................[1](c)E xperiment 5R epeat Experiment 4 using 1 g of iron instead of magnesium. You do not need to test the gas.R ecord your observations in the space below and record your temperatures in the table.C omplete the final column in the table.experiment initial temperature / °Cmaximumtemperature / °Ctemperaturerise / °C45observation ................................................................................................................................[3](d)D raw a labelled bar chart for the results of Experiments 1, 2, 3, 4 and 5 on the grid.temperaturerise/°C[3]U se your results and observations for Experiments 1, 2 and 3 to answer the following questions.(e) (i)W hich experiment, 1, 2 or 3, produced the largest temperature rise? (1)(ii)S uggest why this experiment produced the largest temperature rise.............................................................................................................................................. (1)(f)N ame the gas given off in Experiment 4. (1)(g)S uggest why potassium was not used as one of the metals in these experiments. (1)(h)G ive one advantage of using a measuring cylinder to add the hydrochloric acid to the boilingtube. (1)(i)S uggest and explain one change to improve the accuracy of these experiments......................................................................................................................................................................................................................................................................................................... (2)[Total: 17]2Y ou are provided with a mixture of two solids, G and H.S olid G is water soluble and solid H is insoluble in water.C arry out the following tests on the mixture, recording all of your observations at each stage.A dd about 15 cm3 of distilled water to the mixture in a boiling tube.S hake the boiling tube for one minute. Filter the contents of the tube, keeping the filtrate and the residue. Divide the filtrate into four equal portions in four test-tubes and carry out the following tests.tests on filtrate(a) (i)A dd several drops of aqueous sodium hydroxide to the first portion of the solution andshake the test-tube.N ow add excess aqueous sodium hydroxide to the test-tube.R ecord your observations........................................................................................................................................................................................................................................................................................... (3)(ii)U sing the second portion of the solution, repeat the test in (a)(i) using aqueous ammonia instead of aqueous sodium hydroxide.R ecord your observations.............................................................................................................................................. (2)(iii)A dd a few drops of dilute nitric acid to the third portion of the solution followed by about1 cm3 of aqueous silver nitrate.R ecord your observations. (1)(iv)P our the fourth portion of the solution into a boiling tube.A dd about 1 cm3 of aqueous sodium hydroxide and a small piece of aluminium foil.W arm the mixture carefully and test the gas given off.R ecord your observations........................................................................................................................................................................................................................................................................................... (3)(b)I dentify solid G..................................................................................................................................................... (2)tests on the residue(c)U se a spatula to transfer some of the residue into a test-tube.T o the residue, add about 2 cm3 of dilute hydrochloric acid. Test any gases given off.R ecord your observations......................................................................................................................................................................................................................................................................................................... (3)(d)C arry out a flame test on the residue.R ecord your observations. (1)(e)I dentify solid H..................................................................................................................................................... (2)[Total: 17]3N ickel sulfate-6-water, NiSO4.6H2O, is a blue crystalline salt.P lan an experiment to obtain a sample of pure water from this salt. Your answer should include a diagram of the apparatus, any expected observations and a test to show the presence of pure water.Y ou are provided with common laboratory apparatus............................................................................................................................................................ ........................................................................................................................................................... ........................................................................................................................................................... ........................................................................................................................................................... ........................................................................................................................................................... ........................................................................................................................................................... .. (6)[Total: 6]NOTES FOR USE IN QUALITATIVE ANALYSISTest for anionsanion test test resultcarbonate (CO32–)add dilute acid effervescence, carbon dioxideproducedchloride (C l–) [in solution]acidify with dilute nitric acid, then addaqueous silver nitratewhite ppt.bromide (Br –) [in solution]acidify with dilute nitric acid, then addaqueous silver nitratecream ppt.iodide (I–) [in solution]acidify with dilute nitric acid, then addaqueous silver nitrateyellow ppt.nitrate (NO3–)[in solution]add aqueous sodium hydroxide, thenaluminium foil; warm carefullyammonia producedsulfate (SO42–)[in solution]acidify, then add aqueous bariumnitratewhite ppt.sulfite (SO32–)add dilute hydrochloric acid, warmgently and test for the presence ofsulfur dioxidesulfur dioxide produced will turnacidified aqueous potassiummanganate(VII) from purple tocolourlessTest for aqueous cationscation effect of aqueous sodium hydroxide effect of aqueous ammonia aluminium (A l3+)white ppt., soluble in excess giving acolourless solutionwhite ppt., insoluble in excessammonium (NH4+)ammonia produced on warming–calcium (Ca2+)white ppt., insoluble in excess no ppt. or very slight white ppt. chromium(III) (Cr3+)green ppt., soluble in excess grey-green ppt., insoluble in excess copper (Cu2+)light blue ppt., insoluble in excess light blue ppt., soluble in excess,giving a dark blue solutioniron(II) (Fe2+)green ppt., insoluble in excess green ppt., insoluble in excess iron(III) (Fe3+)red-brown ppt., insoluble in excess red-brown ppt., insoluble in excesszinc (Zn2+)white ppt., soluble in excess, giving acolourless solution white ppt., soluble in excess, giving a colourless solutionPermission to reproduce items where third-party owned material protected by copyright is included has been sought and cleared where possible. Every reasonable effort has been made by the publisher (UCLES) to trace copyright holders, but if any items requiring clearance have unwittingly been included, the publisher will be pleased to make amends at the earliest possible opportunity.To avoid the issue of disclosure of answer-related information to candidates, all copyright acknowledgements are reproduced online in the Cambridge International Examinations Copyright Acknowledgements Booklet. This is produced for each series of examinations and is freely available to download at after the live examination series.Cambridge International Examinations is part of the Cambridge Assessment Group. Cambridge Assessment is the brand name of University of Cambridge Local Examinations Syndicate (UCLES), which is itself a department of the University of Cambridge.Test for gases Flame tests for metal ions gastest and test resultsmetal ion flame colour ammonia (NH 3)turns damp, red litmus paper bluelithium (Li +)red carbon dioxide (CO 2)turns limewater milky sodium (Na +)yellow chlorine (C l 2)bleaches damp litmus paper potassium (K +)lilac hydrogen (H 2)‘pops’ with a lighted splint copper(II ) (Cu 2+)blue-greenoxygen (O 2)relights a glowing splintsulfur dioxide (SO 2)turns acidifed aqueous potassium manganate(VII ) from purple to colourless。

九天国际教育GCSE真题June 2014 QP - Unit 1 (H) OCR Chemistry (A) GCSE

INSTRUCTIONS TO CANDIDATES •Write your name, centre number and candidate number in the boxes above. Please write clearly and in capital letters.• Use black ink. HB pencil may be used for graphs and diagrams only.• Answer all the questions.• Read each question carefully. Make sure you know what you have to do before startingyour answer.• Write your answer to each question in the space provided. Additional paper may beused if necessary but you must clearly show your candidate number, centre number and question number(s).• Do not write in the bar RMATION FOR CANDIDATES • The quality of written communication is assessed in questions marked with a pencil ( ).• The Periodic T able is printed on the back page.• The number of marks is given in brackets [ ] at the end of each question or part question.• The total number of marks for this paper is 60.•This document consists of 24 pages. Any blank pages are indicated.OCR is an exempt CharityTurn over© OCR 2014 [K/601/7548]DC (AC/SW) 74821/5*1202760481*© OCR 2014Answer all the questions.1 Sulfur dioxide is an air pollutant.The graph shows the amount of sulfur dioxide put into the air from 1990 to 2010 in the UK.19901995200020052010sulfur dioxidein millions of tonnesyear(a) (i) What was the amount of sulfur dioxide put into the air in 2010 as a fraction of that in2000?answer = .......................................................... [1] (ii) The Government says that the amount of sulfur dioxide put into the air falls to a thirdevery 10 years since 1990.Is this true? Justify your answer............................................................................................................................................ ........................................................................................................................................... ........................................................................................................................................... . (2)Turn over© OCR 2014Most sulfur dioxide in the air comes from power stations.This graph shows the number of coal-fired power stations in the UK between 1990 and 2010.yearnumber of coal-fired power stations(b) Look at the two graphs.What is the correlation shown by the data? (2)(c)Power stations can also burn natural gas.The amount of sulfur dioxide put into the air is lowered by removing sulfur from natural gas.Sulfur is removed from molecules in natural gas by reacting them with hydrogen.The diagram shows this type of reaction.(i) Complete this diagram to show the correct number of hydrogen and hydrogen sulfidemolecules.a moleculewith sulfur atomshydrogen methane hydrogen sulfide[2](ii) The flow scheme shows the process of removing sulfur from natural gas.natural gas andoxygen sulfur atomsStage 2 converts hydrogen sulfide into water and sulfur.Suggest why stage 2 is necessary.................................................................................................................................................................................................................................................................................................................................................................................................................................. (2)[Total: 9]© OCR 2014Turn over© OCR 20142 (a) Dom and Kate live in a town that has bus lanes. Only buses can drive in bus lanes. This means that at busy times buses travel faster thancars.Buses and cars make carbon dioxide and other pollutants when they burn fuel.Dom says there will be less air pollution as more people will travel by bus.Kate says there will be more air pollution as a bus burns more fuel than a car. Who is correct and why?The quality of written communication will be assessed in your answer ......................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................[6](b)Biofuels may be used to run buses instead of fuels from crude oil.Suggest a reason for using biofuel. Explain your answer.......................................................................................................................................................................................................................................................................................................................................................................................................................................................... (2)A fuel is burned to make only carbon dioxide and water.(c)What does this tell you about the elements in the fuel and the conditions in which the fuel burns?......................................................................................................................................................................................................................................................................................................................................................................................................................................................... (2)Which term describes the changes to the elements in the fuel as it burns?(d)Put a ring around the correct answer.carbonised electrolysed neutralised oxidised reduced [1][Total: 11]© OCR 2014Turn over© OCR 20143 A supermarket uses plastic carrier bags.The handles of some of a new set of bags break when customers carry their shopping away.The supermarket complains to the company that makes the bags. The company tests 5 of the new set of bags. They find the mass that will break each bag.Here are their measurements.Bag number12345Mass to break handle in kg6.58.26.110.29.0(a) (i) Use all their measurements to find the mean value of the mass to break the handles. Show your working.answer = ..................................................... kg [2](ii) The company compare the data for the old and new sets of bags.Old set of bags New set of bagsMean value of mass to break the handles in kg 14.5Range of values of mass to break the handles in kg10.0 – 18.5Complete the table with your answer to (a)(i) and the range of values. Has the strength of the bags changed?Use the data to explain your conclusion............................................................................................................................................ ........................................................................................................................................... ........................................................................................................................................... ......................................................................................................................................[2]Carrier bags are made of polyethene.(b)There are two types of polyethene.High density polyethene (HDPE) is stronger than low density polyethene (LDPE).HDPE is more crystalline than LDPEHow do the arrangements of molecules in HDPE and LDPE differ?Suggest a reason why this makes HDPE stronger.Y ou may use diagrams to help you answer.......................................................................................................................................................................................................................................................................................................................................................................................................................................................... (2)[Total: 6]© OCR 2014BLANK PAGEQuestion 4 begins on page 10PLEASE DO NOT WRITE ON THIS PAGETurn over © OCR 20144 An oil company refines crude oil into different fractions.This table shows the volume of each fraction made from a barrel of crude oil in litres.It also shows the range of the number of carbon atoms in the molecules in each fraction.fraction fraction in one barrelof crude oil in litresnumber of carbon atoms in moleculestop of barrel liquefied fuel gas 3 1 – 4petrol 40 5 – 10making chemicals 8 6 – 12fuel oil 8813 – 25lubricants 820 – 22 bottom of barrel bitumen for roads 1325+(a)Show that more than 80% of the crude oil is used as fuel.[2]© OCR 2014(b)Describe the trend in boiling points of the fractions from the top to the bottom of the barrel.Explain, using data from the table, why the boiling points change from one fraction to the next.The quality of written communication will be assessed in your answer............................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................ (6)[Total: 8]BLANK PAGEPLEASE DO NOT WRITE ON THIS PAGE5 This is a question about nanotechnology.Nanotechnology is the use and control of particles that are very small.(a)What is the range of sizes of nanoparticles?Put a tick (✓) in the box next to the correct answer.0.1 to 1 nm1 to 100 nm100 to 200 nm200 to 1000 nm[1]Some calculators have photocells to absorb light to(b)charge the battery.Photocells contain gold which absorbs light on its surface.Explain why photocells contain gold nanoparticles ratherthan a solid piece of gold.......................................................................................................................................................................................................................................................................................................................................................................................................................................................... (2)(c)Some scientists are concerned about the possible effects of nanoparticles on humans.Give two reasons why scientists are concerned.......................................................................................................................................................................................................................................................................................................................................................................................................................................................... (2)[Total: 5]6 Some people are talking about the Government’s advice on eating salt.This is what they say.(a) (i) Who is talking about information that has been peer reviewed ? Put ticks (✓) in the boxes next to the two correct answers. Dr Abbott Miss Brown Mr Collins Professor DerryMrs Evans[1](ii) Who is saying that a benefit of salt in food, outweighs a risk from eating too much salt?tick(✓) in the box next to the correct answer.aPutAbbottDrBrownMissCollinsMrDerryProfessorEvansMrs[1](iii) Which person is wrong about their salt intake?Put a tick (✓) in the box next to the correct answer.AbbottDrBrownMissCollinsMrProfessorDerryEvansMrs[1](iv) Companies add salt to foods to preserve them and for one other reason.What is that other reason? (1)(b)(i) People with high blood pressure can use potassium chloride as a substitute for salt(sodium chloride).Rocks containing potassium chloride are found deep underground and mined in thesame ways as those containing sodium chloride.Companies make potassium chloride using solution mining.Suggest reasons why they might use solution mining rather than digging rocks out of theground.................................................................................................................................................................................................................................................................................................................................................................................................................................. (2)(ii) The electrolysis of potassium chloride solution is similar to the electrolysis of sodium chloride.What three products are made when potassium chloride solution is electrolysed?............................................................................................................................ (2)[Total: 8]BLANK PAGEQuestion 7 begins on page 18 PLEASE DO NOT WRITE ON THIS PAGE7 In remote parts of a developing country, the drinking water causes diseases that kill people. In one area people started to add chlorine to drinking water from 2009. A charity raised the money to pay for this.Look at the graphs.450 000400 000population with chlorine added to drinking wateryear350 000300 000250 000200 000150 000100 00050 000020 00040 00060 000number of people with disease from drinking water200920102011year201280 000100 000120 000Describe in detail what the two graphs tell you.What conclusions can you make about the effectiveness of adding chlorine to drinking water in this area?The quality of written communication will be assessed in your answer........................................................................................................................................................... .......................................................................................................................................................... .......................................................................................................................................................... .......................................................................................................................................................... .......................................................................................................................................................... .......................................................................................................................................................... .......................................................................................................................................................... .......................................................................................................................................................... .. (6)[Total: 6]8 Geologists understand the history of the Earth’s surface by looking at rocks.(a)Features in these rocks tell us things about their origin.Draw a straight line from each feature to what it tells us.feature what it tells usrock salt formed in fast flowing riversfossils of plantsand animalsformed in desertsrounded grains ofsand in sandstonethe age of the rocksharp grains of sand in sandstone formed when shallow seas evaporated[3](b)Salt, limestone and coal were made in different climatic conditions.All three of these rock types are found in north west England.Which two statements, when put together, explain how this happened?Put ticks (✓) in the boxes next to the two correct answers.The atmosphere of the early Earth was mainly nitrogen.Ocean currents cause land areas to move.When continents moved their climate changed.The weather in the UK changes every day.Earthquakes occur on the edges of tectonic plates as they move.Tectonic plates move across the Earth.[2](c)Studies of the magnetic properties of rocks tell scientists about the rocks.What do they measure and what does this tell them about the rocks?......................................................................................................................................................................................................................................................................................................................................................................................................................................................... (2)[Total: 7]END OF QUESTION PAPERBLANK PAGEPLEASE DO NOT WRITE ON THIS PAGEPLEASE DO NOT WRITE ON THIS PAGECopyright InformationOCR is committed to seeking permission to reproduce all third-party content that it uses in its assessment materials. OCR has attempted to identify and contact all copyright holders whose work is used in this paper. To avoid the issue of disclosure of answer-related information to candidates, all copyright acknowledgements are reproduced in the OCR Copyright Acknowledgements Booklet. This is produced for each series of examinations and is freely available to download from our public website () after the live examination series.If OCR has unwittingly failed to correctly acknowledge or clear any third-party content in this assessment material, OCR will be happy to correct its mistake at the earliest possible opportunity.For queries or further information please contact the Copyright Team, First Floor, 9 Hills Road, Cambridge CB2 1GE.OCR is part of the Cambridge Assessment Group; Cambridge Assessment is the brand name of University of Cambridge Local Examinations Syndicate (UCLES), which is itself a department of the University of Cambridge.T h e P e r i o d i c T a b l e o f t h e E l e m e n t s* T h e l a n t h a n o i d s (a t o m i c n u m b e r s 58-71) a n d t h e a c t i n o i d s (a t o m i c n u m b e r s 90-103) h a v e b e e n o m i t t e d .T h e r e l a t i v e a t o m i c m a s s e s o f c o p p e r a n d c h l o r i n e h a v e n o t b e e n r o u n d e d t o t h e n e a r e s t w h o l e n u m b e r .12345670K e y1H h y d r o g e n 14H eh e l i u m27L il i t h i u m39B eb e r y l l i u m4r e l a t i v e a t o m i c m a s s a t o m i c s y m b o ln a m e a t o m i c (p r o t o n ) n u m b e r 11Bb o r o n512Cc a r b o n 614N n i t r o g e n716O o x y g e n819Ff l u o r i n e920N en e o n1023N as o d i u m1124M gm a g n e s i u m1227A la l u m i n i u m1328S is i l i c o n1431Pp h o s p h o r u s 1532Ss u l f u r 1635.5C lc h l o r i n e 1740A ra r g o n1839Kp o t a s s i u m1940C ac a l c i u m2045S cs c a n d i u m2148T it i t a n i u m2251Vv a n a d i u m2352C rc h r o m i u m2455M nm a n g a n e s e 2556F ei r o n 2659C o c o b a l t 2759N i n i c k e l 2863.5C u c o p p e r 2965Z n z i n c 3070G ag a l l i u m3173G eg e r m a n i u m 3275A sa r s e n i c 3379S es e l e n i u m 3480B rb r o m i n e 3584K rk r y p t o n3685R br u b i d i u m3788S rs t r o n t i u m3889Yy t t r i u m3991Z rz i r c o n i u m4093N bn i o b i u m4196M om o l y b d e n u m42[98]T ct e c h n e t i u m43101R ur u t h e n i u m44103R hr h o d i u m 45106P dp a l l a d i u m 46108A gs i l v e r 47112C d c a d m i u m48115I ni n d i u m 49119S nt i n50122S ba n t i m o n y51128T et e l l u r i u m52127Ii o d i n e53131X ex e n o n54133C sc a e s i u m55137B ab a r i u m56139L a *l a n t h a n u m57178H fh a f n i u m72181T at a n t a l u m73184Wt u n g s t e n74186R er h e n i u m75190O so s m i u m 76192I r i r i d i u m 77195P tp l a t i n u m78197A ug o l d79201H gm e r c u r y 80204T l t h a l l i u m 81207P bl e a d82209B ib i s m u t h83[209]P op o l o n i u m 84[210]A ta s t a t i n e85[222]R nr a d o n86[223]F rf r a n c i u m 87[226]R ar a d i u m 88[227]A c *a c t i n i u m 89[261]R f r u t h e r f o r d i u m104[262]D bd u b n i u m105[266]S gs e a b o r g i u m106[264]B hb o h r i u m 107[277]H s h a s s i u m 108[268]M t m e i t n e r i u m109[271]D sd a r m s t a d t i u m110[272]R g r o e n t g e n i u m111E l e m e n t s w i t h a t o m i c n u m b e r s 112-116 h a v e b e e n r e p o r t e d b u t n o t f u l l y a u t h e n t i c a t e d。

九天国际教育GCSE真题June 2017 QP - Unit C3 (H) Edexcel Chemistry GCSE

Write your name here*P48584A0120*P48584A©2017 Pearson Education Ltd.1/1/1/1/Turn over Instructions• Use black ink or ball-point pen.• Fill in the boxes at the top of this page with your name,centre number and candidate number.• Answer all questions.• Answer the questions in the spaces provided– there may be more space than you need.Information• The total mark for this paper is 60.• The marks for each question are shown in brackets– use this as a guide as to how much time to spend on each question.• Questions labelled with an asterisk (*) are ones where the quality of yourwritten communication will be assessed– y ou should take particular care with your spelling, punctuation and grammar, aswell as the clarity of expression, on these questions.Advice• Read each question carefully before you start to answer it.• Try to answer every question.• Check your answers if you have time at the end.2Questions begin on next page.4Put a cross (62 (a) Complete the sentence by putting a cross ((d) Esters are useful organic compounds.Describe a use of esters.(2) .................................................................................................................................................................................................................................................................................... .................................................................................................................................................................................................................................................................................... ....................................................................................................................................................................................................................................................................................(e) Describe how a fat can be reacted to form a soap.(2) .................................................................................................................................................................................................................................................................................... .................................................................................................................................................................................................................................................................................... ....................................................................................................................................................................................................................................................................................(Total for Question 2 = 9 marks)83(a) Give the name or the formula of an ion that causes hardness in water.(c) A solution of zinc chloride, ZnCl2, is prepared by reacting zinc carbonate, ZnCO3,with dilute hydrochloric acid.(i) Write the balanced equation for this reaction.(3) ....................................................................................................................................................................................................................................................................................(ii) A solution of zinc chloride, ZnCl2, has a concentration of 0.25 mol dm–3.Calculate the concentration of this solution in g dm–3.(relative atomic masses: Zn = 65, Cl = 35.5)(2) .................................................................................................................................................................................................................................................................................... .................................................................................................................................................................................................................................................................................... .................................................................................................................................................................................................................................................................................... ....................................................................................................................................................................................................................................................................................concentration of solution = ................................................................ g dm–3(d) In an experiment, 25.0 cm3 samples of a solution of sodium hydroxide, NaOH,were titrated with 0.095 mol dm–3 hydrochloric acid, HCl.NaOH + HCl o NaCl + H2O18.5cm3 of the hydrochloric acid neutralised 25.0 cm3 of the sodium hydroxide solution.Calculate the concentration of the sodium hydroxide solution, NaOH, in mol dm–3.(2) .................................................................................................................................................................................................................................................................................... .................................................................................................................................................................................................................................................................................... .................................................................................................................................................................................................................................................................................... .................................................................................................................................................................................................................................................................................... .................................................................................................................................................................................................................................................................................... ....................................................................................................................................................................................................................................................................................concentration of sodium hydroxide solution = ................................................................ mol dm–3(Total for Question 3 = 11 marks)10Analysis4(a) Excess dilute sulfuric acid is added to a solid sample of a copper compound. A gas is given off and a blue solution is formed. (i) The gas turns limewater cloudy.Explain how this result is used to identify the anion in the copper compound.(2)................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................(ii) When sodium hydroxide solution is added to the blue solution,a pale blue precipitate is formed.Give the name or the formula of the pale blue precipitate.(1)....................................................................................................................................................................................................................................................................................(iii) The blue solution contains sulfate ions.Barium chloride solution is added to this blue solution. A white precipitate of barium sulfate forms.Write the ionic equation, including state symbols, for this reaction.(3)....................................................................................................................................................................................................................................................................................(b) A colourless solution contains a halide ion.Describe a test to show which of the halide ions, chloride, Cl–, bromide, Br–, oriodide, I–, is present in the colourless solution.(4) .................................................................................................................................................................................................................................................................................... .................................................................................................................................................................................................................................................................................... .................................................................................................................................................................................................................................................................................... .................................................................................................................................................................................................................................................................................... .................................................................................................................................................................................................................................................................................... .................................................................................................................................................................................................................................................................................... .................................................................................................................................................................................................................................................................................... .................................................................................................................................................................................................................................................................................... .................................................................................................................................................................................................................................................................................... ....................................................................................................................................................................................................................................................................................(Total for Question 4 = 10 marks)12Gases 5(a) Sulfur dioxide combines with oxygen to form sulfur trioxide in anexothermic reaction.2SO 2(g) + O 2(g) U 2SO 3(g)The reaction can reach equilibrium.At 2 atmospheres pressure, 450q C and using a vanadium(V) oxide catalyst, the equilibrium yield of sulfur trioxide, SO 3, is 96%.(i) When a temperature higher than 450q C is used, the equilibrium yield of sulfur trioxide decreases. All the other conditions are unchanged. Explain why the equilibrium yield of sulfur trioxide decreases.(2)........................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................(ii) When a pressure higher than 2 atmospheres is used, the equilibrium yield of sulfur trioxide increases. All the other conditions are unchanged. Explain why the equilibrium yield of sulfur trioxide increases.(2)........................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................forward reaction and on the rate of the reverse reaction?14 *(c) The reaction between a known mass of magnesium ribbon and excessdilute sulfuric acid can be used to determine the volume occupied by one mole of(Total for Question 5 = 12 marks)166(a) A metal spoon is plated with silver using electrolysis.(b) The diagram shows the apparatus used for the electrolysis ofcopper sulfate solution using a pure copper cathode and impure copper anode.18 *(c) The products of electrolysis can vary depending on whether the salt forming the electrolyte is molten or in aqueous solution.Explain this statement by referring to the products of electrolysis of molten sodium chloride and of electrolysis of sodium chloride solution.Include in your answer the names of all the ions present in each electrolyte and how the product at each electrode is formed from ions present. You may use half-equations if you wish.(6)....................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................(Total for Question 6 = 12 marks)TOTAL FOR PAPER = 60 MARKS20BLANK PAGE。

九天国际教育GCSE真题June 2013 (v3) QP - Paper 2 CIE Chemistry IGCSE

READ THESE INSTRUCTIONS FIRSTWrite your Centre number, candidate number and name in the spaces at the top of this page.Write in dark blue or black pen.You may need to use a pencil for any diagrams, graphs or rough working.Do not use staples, paper clips, highlighters, glue or correction ﬂ uid.DO NOT WRITE IN ANY BARCODES.Answer all questions.Electronic calculators may be used.A copy of the Periodic Table is printed on page 16.You may lose marks if you do not show your working or if you do not use appropriate units.At the end of the examination, fasten all your work securely together.The number of marks is given in brackets [ ] at the end of each question or part question.CHEMISTRY0620/23Paper 2May/June 20131 hour 15 minutesCandidates answer on the Question Paper.No Additional Materials are required.UNIVERSITY OF CAMBRIDGE INTERNATIONAL EXAMINATIONS International General Certiﬁ cate of Secondary EducationThis document consists of 14 printed pages and 2blank pages.[Turn overIB13 06_0620_23/3RP © UCLES 2013*4714033593*0620/23/M/J/13© UCLES 2013For Examiner’sUse1T he structures of ﬁ ve atoms, A , B , C , D and E , are shown below.ABCDE(a) A nswer the following questions about these structures. Each structure can be used once,more than once or not at all.(i) W hich two structures are hydrogen atoms? ............. and ............. (ii) W hich structure represents an atom of a metal?.............(iii) W hich structure has a proton (atomic) number of 3? ............. (iv) W hich structure has two neutrons in its nucleus? .............[5](b) T he structure of carbon-12 can be written C 612.W rite the structure of atom D in a similar way.[1](c) C omplete the following sentences about isotopes using words from the list below.atoms energy iron moleculesneutrons protons radioactive stableI sotopes are atoms of the same element with the same number of ....................... and different numbers of ....................... . Some isotopes such as uranium-235 are ........................ . Uranium-235 can be used as a source of ....................... .[4][Total: 10]For2The table shows some physical properties of the Group VII elements.Examiner’sUse Array(a)U se the information in the table to explain why(i)c hlorine is a gas at room temperature, ...................................................................... (1)(ii)b romine is a liquid at room temperature. ................................................................... (1)(b)D escribe the trend in atomic radius going down the group from chlorine to iodine. (1)(c)S uggest a value for the atomic radius of ﬂ uorine. (1)(d)D escribe the colour of chlorine. (1)(e)A chlorine atom has 17 electrons.Complete the following structure to show how the electrons are arranged.[2](f)C hlorine reacts with potassium bromide to form potassium chloride and bromine.(i)C omplete the symbol equation for this reaction.+ .......KBr → 2KC l + . (2)C l2(ii)E xplain why iodine does not react with potassium bromide. (1)[Total: 10]© UCLES 2013[Turn over0620/23/M/J/13ForExaminer’sUse3A luminium and gallium are in Group III of the Periodic Table.(a)T he heat from your hand is sufﬁ cient to melt gallium.D escribe the change in state from solid to liquid in terms of the kinetic particle theory.I n your answer include●t he difference in arrangement and closeness of the particles in a solid and a liquid,●t he difference in the motion of the particles in a solid and a liquid............................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................. (5)(b)G allium is a metal. Describe three physical properties of gallium which are typical ofmost metals.1........................................................................................................................................2........................................................................................................................................3. (3)(c)W hen it is a gas, gallium(III) chloride has the structure shown below.Ga C lC l C lC lGaC lC lW rite the molecular formula for gallium(III) chloride. (1)0620/23/M/J/13© UCLES 2013ForExaminer’sUse (d)A luminium is used to make high voltage electricity cables.T he table shows some properties of four metals which could be used for overhead powercables.metal relativestrengthdensity ing/cm3relative electricalconductivityprice$ per tonnealuminium9 2.700.42120copper308.920.79600tungsten10019.350.2450steel507.860.1700(i)S uggest why aluminium, rather than tungsten, is used in overhead power cables? (1)(ii)S uggest why steel, rather than copper, is used as a core for overhead power cables. (1)(iii)G ive two reasons why aluminium is used for overhead power cables rather than copper.1.................................................................................................................................2. (2)(e)S tate one use of aluminium other than as an electrical conductor. (1)[Total: 14]0620/23/M/J/13© UCLES 2013[Turn overFor4I mpure water needs to be treated if it is to be used in the home.Examiner’sUse(a) (i)E xplain why ﬁ ltration and chlorination are used in the water treatment process......................................................................................................................................................................................................................................................................... (2)(ii)S tate one use of water in the home. (1)(b)D escribe a chemical test for water.....................................................................................................................................test (2)result(c) (i)C omplete the diagram below to show the electron arrangement in a water molecule.[1](ii)I s the bonding in water covalent or ionic?G ive a reason for your answer. (1)(d)P ure water is neutral. Which one of these pH values is neutral?P ut a ring around the correct answer.pH 0 pH 6 pH 7 pH 9 pH 13[1](e)W ater reacts with sodium. The products are sodium hydroxide and hydrogen.W rite a word equation for this reaction.[1][Total: 9]© UCLES 20130620/23/M/J/130620/23/M/J/13© UCLES 2013[Turn overForExaminer’sUse5 E nergy is given out when fuels burn.(a) S tate the name given to a chemical reaction which releases energy...................................................................................................................................... [1] (b) H ydrogen can be used as a fuel.C omplete the symbol equation for the burning of hydrogen in oxygen........H 2 + ....... → 2H 2O [2] (c) G asoline is a mixture of hydrocarbons containing between 5 and 10 carbon atoms.F our of these hydrocarbons are shown below.C HHH C HH C HH AC HH C HH HC HHH C HH C HH B C H H C HH C HH C HH C HH HC HHH C HH C HH CC HH C HH C HH HC HHH C HH C HH D C HH C HH C HH C HH H(i) W hich one of these structures, A , B , C or D , has the highest relative molecularmass?Y ou are not expected to do any calculations. (1)(ii) G ive one use of gasoline. (1)0620/23/M/J/13© UCLES 2013For Examiner’sUse(d) T he table shows the boiling points of the straight-chain hydrocarbons in the gasolinefraction.(i) O n the grid below, plot a graph to show how the boiling point changes with thenumber of carbon atoms in these hydrocarbons. Draw a smooth curve through the points.567891018016014012010080604020boiling point / °Cnumber of carbon atoms[3](ii)U se your graph to deduce the boiling point of the hydrocarbon with 7 carbon atoms.boiling point ............... °C [1]For(e)T he alkanes are a homologous series of hydrocarbons.Examiner’sUse(i)W hat is meant by the term homologous series?.................................................................................................................................... (2)(ii)A lkanes can be cracked to form alkenes and smaller alkanes.S tate the conditions needed for cracking..................................................................................................................................... (2)[Total: 13]© UCLES 2013[Turn over0620/23/M/J/130620/23/M/J/13© UCLES 2013For Examiner’sUse6 I nks are mixtures of different dyes.(a) A student used paper chromatography to separate the dyes in a particular ink.D escribe how paper chromatography is carried out. You may draw a diagram to help explain your answer. I n your description include● the apparatus you would use,●how chromatography is carried out............................................................................................................................................ ........................................................................................................................................... ........................................................................................................................................... ..................................................................................................................................... [4] (b) The chromatogram below shows the results of a chromatography experiment. X , Y and Z are pure dyes containing only one compound.T he dyes present in four different inks, D , E , F and G are also shown.(i) W hich ink, D , E , F or G , contains all the dyes X , Y and Z ? (1)(ii) W hich ink, D ,E ,F orG , does not contain any of the dyes X , Y and Z ? (1)(iii) W hich ink contains the greatest number of different dyes? (1)ForExaminer’sUse(c) S ome inks contain ethanoic acid.C omplete the structure of ethanoic acid.[1](d) E thanoic acid can be used as a solvent.W hat is the meaning of the term solvent ? (1)(e) T he structure of a dye called Gambine R is shown below.C HO CCHH HNOHC C C C CCHC H(i) How many different types of atom are there in one molecule of Gambine R? (1)(ii) H ow many carbon atoms are there in one molecule of Gambine R? (1)[Total: 11]ForExaminer’sUse7 H ydrogen peroxide, H 2O 2, decomposes in the presence of an enzyme called peroxidase. The products of this reaction are water and oxygen.(a) (i) W hat is meant by the term enzyme ?.................................................................................................................................... (2)(ii) C omplete the symbol equation for this reaction........H 2O 2 → 2H 2O + O 2 [1] (b) A student followed the course of this reaction by measuring the volume of oxygenreleased over a period of time.T he diagram below shows some results that he obtained using hydrogen peroxide at three different concentrations.20406080100403020100volume of oxygen / cm 3time / secondsconcentration of H 2O 20.4 mol / dm 30.2 mol / dm 30.1 mol / dm 3(i) D escribe how the concentration of hydrogen peroxide affects the rate of this reaction............................................................................................................................... [1] (ii) O n the graph above, draw a line to show the course of the reaction when the startingconcentration of hydrogen peroxide is 0.3 mol / dm 3. [2] (iii)F or the concentration of hydrogen peroxide of 0.4 mol / dm 3, deduce●the volume of oxygen given off when the reaction is complete,........................ cm 3●the time it takes to produce 14 cm 3 of oxygen......................... seconds [2]ForExaminer’sUse(c) I n the presence of sulfuric acid, hydrogen peroxide reacts with iodide ions to form iodineand water. This involves the reduction of hydrogen peroxide.(i) W hat is the meaning of the term reduction ?.............................................................................................................................. [1] (ii) C omplete the word equation for the reaction of sulfuric acid with calcium hydroxide.sulfuric acid + calcium hydroxide → ............................ + ............................ (2)(iii) D escribe a test for iodide ions.test .............................................................................................................................result (2)[Total: 13]16Permission to reproduce items where third-party owned material protected by copyright is included has been sought and cleared where possible. Every reasonable effort has been made by the publisher (UCLES) to trace copyright holders, but if any items requiring clearance have unwittingly been included the publisher will be pleased to make amends at the earliest possible opportunity.University of Cambridge International Examinations is part of the Cambridge Assessment Group. Cambridge Assessment is the brand name of University of Cambridge Local Examinations Syndicate (UCLES), which is itself a department of the University of Cambridge.G ro u p140C eC e r i u m 58141P rP r a s e o d y m i u m 59144N d N e o d y m i u m 60P mP r o m e t h i u m61150S mS a m a r i u m62152E uE u r o p i u m63157G dG a d o l i n i u m64159T bT e r b i u m65162D yD y s p r o s i u m66165H oH o l m i u m67167E rE r b i u m68169T mT h u l i u m69173Y bY t t e r b i u m70175L uL u t e t i u m71232T hT h o r i u m 90P aP r o t a c t i n i u m 91238UU r a n i u m92N pN e p t u n i u m93P uP l u t o n i u m94A mA m e r i c i u m95C mC u r i u m96B kB e r k e l i u m97C fC a l i f o r n i u m98E sE i n s t e i n i u m99F mF e r m i u m100M dM e n d e l e v i u m101N oN o b e l i u m102L rL a w r e n c i u m1031HH y d r o g e n17L iL i t h i u m 323N aS o d i u m 1124M gM a g n e s i u m1240C aC a l c i u m 2045S c S c a n d i u m 2148T i T i t a n i u m2251V V a n a d i u m 2352C r C h r o m i u m 2455M n M a n g a n e s e 2556F e I r o n 2659C o C o b a l t 2759N i N i c k e l 2864C u C o p p e r 2965Z nZ i n c3070G aG a l l i u m3127A lA l u m i n i u m1311B B o r o n 512C C a r b o n614NN i t r o g e n716OO x y g e n819FF l u o r i n e928S iS i l i c o n1431PP h o s p h o r u s1532SS u l f u r1635.5C lC h l o r i n e1740A rA r g o n1820N eN e o n104H eH e l i u m273G eG e r m a n i u m3275A sA r s e n i c3379S eS e l e n i u m3480B rB r o m i n e3584K rK r y p t o n3639KP o t a s s i u m 1988S rS t r o n t i u m 3889Y Y t t r i u m 3991Z r Z i r c o n i u m4093N b N i o b i u m 4196M o M o l y b d e n u m 42T c T e c h n e t i u m 43101R u R u t h e n i u m 44103R h R h o d i u m 45106P d P a l l a d i u m 46108A gS i l v e r47112C dC a d m i u m48115I nI n d i u m49119S nT i n50122S bA n t i m o n y51128T eT e l l u r i u m52127II o d i n e53131X eX e n o n54137B aB a r i u m 56139L a L a n t h a n u m 57*178H fH a f n i u m72181T a T a n t a l u m 73184W T u n g s t e n 74186R e R h e n i u m 75190O s O s m i u m 76192I rI r i d i u m 77195P t P l a t i n u m78197A uG o l d79201H gM e r c u r y80204T lT h a l l i u m81207P bL e a d82209B iB i s m u t h83P oP o l o n i u m84A tA s t a t i n e85R nR a d o n86F rF r a n c i u m 87227A cA c t i n i u m899B eB e r y l l i u m4II I I I II V V V I V I I 085R bR u b i d i u m 37133C sC a e s i u m 55226R a R a d i u m 88T h e v o l u m e o f o n e m o l e o f a n y g a s i s 24d m 3a t r o o m t e m p e r a t u r e a n d p r e s s u r e (r .t .p .).a Xb a = r e l a t i v e a t o m ic m a s sX = a t o m i c s y m b o lb = p r o t o n (a t o m ic ) n u m b e rK e y *58-71 L a n t h a n o i d s e r i e s 90-103 A c t i n o i d s e r i e s D A T A S H E E T T h e P e r i o d i c T a b l e o f t h e E l e m e n t sPMT。

九天国际教育GCSE真题June 2017 QP - Unit C2 (H) Edexcel Chemistry GCSE

P48582A©2017 Pearson Education Ltd.1/1/1/1/1/*P48582A0120*Instructions•Use black ink or ball-point pen.•Fill in the boxes at the top of this page with your name,centre number and candidate number.•Answer all questions.•Answer the questions in the spaces provided– there may be more space than you need.Information•The total mark for this paper is 60.•The marks for each question are shown in brackets– use this as a guide as to how much time to spend on each question.•Questions labelled with an asterisk (*) are ones where the quality of yourwritten communication will be assessed– y ou should take particular care with your spelling, punctuation and grammar, aswell as the clarity of expression, on these questions.Advice•Read each question carefully before you start to answer it.•Try to answer every question.•Check your answers if you have time at the end.Turn over2*P48582A0220*DO NOT WRITE IN THIS AREA DO NOT WRITE IN THIS AREA DO NOT WRITE IN THIS AREA3*P48582A0320*Turn overD O N O T W R I TE I N T H I S A R E A D O N O T W R I T E I N T H I S A R E A D O N O T W R I T E I N T H I S A R E ABLANK PAGEQuestions begin on next page.4*P48582A0420*DO NOT WRITE IN THIS AREADO NOT WRITE IN THIS AREADO NOT WRITE IN THIS AREA5*P48582A0520*Turn overD O N O T W R I TE I N T H I S A R E AD O N O T W R I TE I N T H I S A R E AD O N O T W R I TE I N T H I S A R E A(c)The rate of the reaction between magnesium ribbon and hydrochloric acid can beincreased by increasing the concentration of the acid.(i ) State two other ways of increasing the rate of this reaction.(2)1 ...............................................................................................................................................................................................................................................................................2 ...............................................................................................................................................................................................................................................................................(ii) Explain, in terms of particles, why increasing the concentration of the acidincreases the rate of this reaction.(2)................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................(Total for Question 1 = 8 marks)6*P48582A0620*DO NOT WRITE IN THIS AREADO NOT WRITE IN THIS AREADO NOT WRITE IN THIS AREA7*P48582A0720*Turn overD O N O T W R I TE I N T H I S A R E AD O N O T W R I TE I N T H I S A R E A D O N O T W R I T E I N T H I S A R E A(c)Calcium reacts with oxygen to form calcium oxide, CaO, an ionic compound. Calcium has an electronic configuration of 2.8.8.2. Oxygen has an electronic configuration of 2.6. Describe, in terms of their electronic configurations, how calcium and oxygen atoms react to form calcium and oxide ions.You may use diagrams to help your answer.(4)............................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................(Total for Question 2 = 8 marks)8*P48582A0820*DO NOT WRITE IN THIS AREADO NOT WRITE IN THIS AREADO NOT WRITE IN THIS AREA9*P48582A0920*Turn overD O N O T W R I TE I N T H I S A R E AD O N O T W R I TE I N T H I S A R E AD O N O T W R I TE I N T H I S A R E A10*P48582A01020*DO NOT WRITE IN THIS AREADO NOT WRITE IN THIS AREADO NOT WRITE IN THIS AREA11*P48582A01120*Turn overD O N O T W R I TE I N T H I S A R E AD O N O T W R I TE I N T H I S A R E AD O N O T W R I TE I N T H I S A R E A(c) In an analysis of copper sulfide, 12.7g of copper was found to be combined with3.2g of sulfur. Calculate the empirical formula of the copper sulfide. Show your working.(relative atomic masses: Cu = 63.5, S = 32)(3)........................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................empirical formula = ......................................................(d) Copper reacts with oxygen to form copper oxide.2Cu + O 2 o 2CuOCalculate the maximum mass of copper oxide that could be formed by reacting 25.4g of copper with excess oxygen.(relative atomic masses: O = 16, Cu = 63.5; relative formula mass: CuO = 79.5)(2)....................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................maximum mass of copper oxide = ......................................................g(Total for Question 4 = 10 marks)12*P48582A01220*DO NOT WRITE IN THIS AREA DO NOT WRITE IN THIS AREA DO NOT WRITE IN THIS AREABLANK PAGE13*P48582A01320*D O N O T W R I TE I N T H I S A R E A D O N O T W R I T E I N T H I S A R E AD O N O T W R I TE I N T H I S A R E ATurn over14*P48582A01420*DO NOT WRITE IN THIS AREADO NOT WRITE IN THIS AREA DO NOT WRITE IN THIS AREA*(d) A sample of neon contains 90% neon-20 and 10% neon-22.An atom of neon-20 contains 10 protons, 10 neutrons and 10 electrons.Describe the structure of a neon-22 atom and explain why, in this sample, the neon has a relative atomic mass of 20.2.(6)................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................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O N O T W R I TE I N T H I S A R E AD O N O T W R I TE I N T H I S A R E A D O N O T W R I T E I N T H I S A R E A ........................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................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for Question 5 = 12 marks)Turn over16*P48582A01620*DO NOT WRITE IN THIS AREA DO NOT WRITE IN THIS AREA DO NOT WRITE IN THIS AREABLANK PAGE17*P48582A01720*Turn overD O N O T W R I TE I N T H I S A R E AD O N O T W R I TE I N T H I S A R E AD O N O T W R I TE I N T H I S A R E AStructures of substances6 (a) Explain, in terms of their structure, how metals conduct electricity.(2)....................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................(b) Oxygen is a simple molecular, covalent substance.The electronic configuration of an atom of oxygen is 2.6 .Draw the dot and cross diagram of an oxygen molecule, O 2. Show outer electrons only.(2)(c) Potassium chloride is an ionic substance. The melting point of potassium chloride is 770°C.Explain why potassium chloride has such a high melting point.(2)....................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................。

九天国际教育GCSE真题November 2014 (v3) QP - Paper 3 CIE Chemistry IGCSE

This document consists of 12 printed pages.[Turn overIB14 11_0620_33/RP© UCLES 2014*8916450001*READ THESE INSTRUCTIONS FIRSTWrite your Centre number, candidate number and name on all the work you hand in.Write in dark blue or black pen.You may use an HB pencil for any diagrams or graphs.Do not use staples, paper clips, glue or correction ﬂ uid.DO NOT WRITE IN ANY BARCODES.Answer all questions.Electronic calculators may be used.A copy of the Periodic Table is printed on page 12.You may lose marks if you do not show your working or if you do not use appropriate units.At the end of the examination, fasten all your work securely together.The number of marks is given in brackets [ ] at the end of each question or part question.CHEMISTRY 0620/33Paper 3 (Extended) October/November 20141 hour 15 minutes Candidates answer on the Question Paper.No Additional Materials are required.Cambridge International Examinations Cambridge International General Certi ﬁcate of Secondary EducationThe syllabus is approved for use in England, Wales and Northern Ireland as a Cambridge International Level 1/Level 2 Certi ﬁ cate.1F or each of the following elements give one physical property and one chemical property.)(a)b romine (Br2physical property .......................................................................................................................chemical property ......................................................................................................................[2](C)(b)c arbongraphitephysical property .......................................................................................................................chemical property ......................................................................................................................[2](c)m anganese (Mn)physical property .......................................................................................................................chemical property ......................................................................................................................[2][Total: 6]© UCLES 20140620/33/O/N/140620/33/O/N/14© UCLES 2014[Turn over2C ompound X is a colourless liquid at room temperature. (a) A sample of pure X was slowly heated from –5.0 °C, which is below its melting point, to 90 °C,which is above its boiling point. Its temperature is measured every minute and the results are represented on the graph.time t °90 °–5 ° (i) C omplete the equation for the equilibrium present in the region BC .X(s).................... [1] (ii) W hat is the signi ﬁ cance of temperature t °C?....................................................................................................................................... [1] (iii) W hat is the physical state of compound X in the region EF ?....................................................................................................................................... [1] (iv) W hat would be the difference in the region BC if an impure sample of X had been used? (1)(b) C ompound X is a hydrocarbon. It contains 85.7% of carbon. The mass of one mole of X is 84 g. (i) W hat is the percentage of hydrogen in the compound ?....................................................................................................................................... [1] (ii) C alculate the empirical formula of X. Show your working.empirical formula = (3)(iii) W hat is the molecular formula of compound X? (1)[Total: 9]3I n 1985 the fullerenes were discovered. They are solid forms of the element carbon. The structure fullerene is given below.of the C60 Array fullerene, how many other carbon atoms is each carbon atom bonded to?(a)(i)I n the C60 (1)(ii)A nother fullerene has a relative molecular mass of 840.H ow many carbon atoms are there in one molecule of this fullerene? (1)(b)F ullerenes are soluble in liquid hydrocarbons such as octane. The other solid forms of carbonare insoluble.D escribe how you could obtain crystals of fullerenes from soot which is a mixture of fullerenesand other solid forms of carbon............................................................................................................................................................................................................................................................................................................................................................................................................................................................. (3)(c)A mixture of a fullerene and potassium is an excellent conductor of electricity.(i)W hich other form of solid carbon is a good conductor of electricity? (1)(ii)E xplain why metals, such as potassium, are good conductors of electricity.............................................................................................................................................. (2)(iii)T he mixture of fullerene and potassium has to be stored out of contact with air. There are substances in unpolluted air which will react with potassium.N ame two potassium compounds which could be formed when potassium is exposed toair. (2)[Total: 10]© UCLES 20140620/33/O/N/140620/33/O/N/14© UCLES 2014[Turn over4A fuel cell produces electrical energy by the oxidation of a fuel by oxygen.T he fuel is usually hydrogen but methane and methanol are two other fuels which may be used. A diagram of a hydrogen fuel cell is given below.(a) W hen the fuel is hydrogen, the only product is water.W hat additional product would be formed if methane was used? (1)(b) W rite the equation for the chemical reaction that takes place in a hydrogen fuel cell............................................................................................................................................... [1] (c) (i) At which electrode does oxidation occur? Explain your choice........................................................................................................................................ [1] (ii) W rite an ionic equation for the reaction at this electrode. (2)(d)F uel cells are used to propel cars.G ive two advantages of a fuel cell over a gasoline-fuelled engine..................................................................................................................................................... . (2)[Total: 7]0620/33/O/N/14© UCLES 2014I ) decomposes to form sodium chloride and oxygen. The rate of this reactionI ) is stored in a dark bottle to prevent exposure to light.2NaC l O → 2NaC l + O 2The rate of this decomposition can be studied using the following experiment.S odium chlorate(I ) is placed in the ﬂ ask and 0.2 g of copper(II ) oxide is added. This catalysesthe decomposition of the sodium chlorate(I ) and the volume of oxygen collected is measured every minute. The results are plotted to give a graph of the type shown below.volumeof oxygentime(i) E xplain why the gradient (slope) of this graph decreases with time.............................................................................................................................................. (2)(ii) C obalt(II ) oxide is a more ef ﬁ cient catalyst for this reaction than copper(II ) oxide.S ketch, on the grid, the graph for the reaction catalysed by cobalt(II ) oxide. A ll other conditions were kept constant. [2](iii)W hat can you deduce from the comment that sodium chlorate(I) has to be shielded from light?............................................................................................................................................. (1)(iv)E xplain, in terms of collisions between particles, why the initial gradient would be steeper if the experiment was repeated at a higher temperature........................................................................................................................................................................................................................................................................................................................................................................................................................................ (3)(b)T he ions present in aqueous sodium chloride are Na+(aq), C l–(aq), H+(aq) and OH–(aq).T he electrolysis of concentrated aqueous sodium chloride forms three products. They are hydrogen, chlorine and sodium hydroxide.(i)E xplain how these three products are formed. Give ionic equations for the reactions at theelectrodes..................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................... (4)(ii)I f the solution of the electrolyte is stirred, chlorine reacts with sodium hydroxide to form sodium chlorate(I), sodium chloride and water.W rite an equation for this reaction.C l2 + ...NaOH → ..................... + ..................... + .....................[2][Total: 14]0620/33/O/N/14© UCLES 2014[Turn over6R ubidium and strontium are very reactive metals at the top of the reactivity series. Because their ions have different charges, their compounds behave differently when heated.(a)T he formulae of the ions of these two elements are Rb+ and Sr2+.E xplain why these metals, which are in different groups, form ions which have different charges..................................................................................................................................................... (2)(b)S trontium carbonate is similar to calcium carbonate. It is insoluble in water and it decomposeswhen heated. Rubidium carbonate is soluble in water and does not decompose when heated.(i)D escribe a method to prepare a pure sample of the insoluble salt, strontium carbonate, byprecipitation..................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................... (4)(ii)C omplete the equation for the decomposition of strontium carbonate.SrCO3→ ............ + ............[1](c)Metal nitrates decompose when heated.(i)R ubidium nitrate decomposes as follows:2RbNO3→ 2RbNO2+ O2W hat is the name of the compound RbNO2? (1)(ii)T he nitrates of most other metals decompose in a different way.C omplete the equation for the decomposition of strontium nitrate........Sr(NO3)2→ ............ + 4NO2+ ............[2][Total: 10]0620/33/O/N/14© UCLES 20147B utane is oxidised to a mixture of carboxylic acids by oxygen in the presence of a catalyst.T he acids formed are methanoic acid, ethanoic acid and propanoic acid – the ﬁ rst three members of the carboxylic acid homologous series.(a) (i)G ive the name and structural formula of the fourth member of this series.name...................................................................................................................................structural formula showing all the atoms and bonds[3](ii) State three characteristics of a homologous series........................................................................................................................................................................................................................................................................................... (3)(iii)A ll members of this series are weak acids.W hat is meant by the term weak acid ?.......................................................................................................................................................................................................................................................................................... (3)(b)C arboxylic acids react with alcohols to form esters. Ethanol reacts with ethanoic acid to formthe ester ethyl ethanoate, CH3COOCH2CH3.(i)G ive the name and formula of the ester which is formed from methanol and propanoicacid.name................................................................................................................................... formula................................................................................................................................[2](ii)W hat is the name of the ester which has the formula CH3COOCH3? (1)0620/33/O/N/14© UCLES 2014[Turn over(c) (i)C omplete the equation for the oxidation of butane to propanoic acid.3C4H10+ .........O2→ 4C2H5COOH + .......H2O[1](ii)N ame another compound which can be oxidised to propanoic acid. (1)[Total: 14]0620/33/O/N/14© UCLES 2014110620/33/O/N/14© UCLES 20148 (a) D escribe how cobalt chloride paper can be used to test for the presence of water. .................................................................................................................................................... . (2)(b) C omplete the description of the preparation of crystals of the soluble salt, cobalt(II )chloride-6-water, CoC l 2.6H 2O, from the insoluble base, cobalt(II ) carbonate.CoCO 3(s) + 2HC l (aq) → CoC l 2(aq) + CO 2(g) + H 2O(l)50 cm 3 of dilute hydrochloric acid, concentration 2.2 mol / dm 3, was heated and cobalt(II ) carbonate was added in small amounts until ................................................................................................................................................................................................................................. .................................................................................................................................................... .................................................................................................................................................... .................................................................................................................................................... .............................................................................................................................................. [4] (c) 6.31 g of cobalt(II ) chloride-6-water crystals were obtained. Calculate the percentage yield to 1 decimal place.number of moles of HC l in 50 cm 3 of acid, concentration 2.2 mol / dm 3 = .............. maximum number of moles of CoC l 2.6H 2O which could be formed = .............. mass of 1 mole of CoC l 2.6H 2O = 238 g maximum yield of CoC l 2.6H 2O = .............. gpercentage yield = ..............%[4][Total: 10]PMT120620/33/O/N/14© UCLES 2014Permission to reproduce items where third-party owned material protected by copyright is included has been sought and cleared where possible. Every reasonable effort has been made by the publisher (UCLES) to trace copyright holders, but if any items requiring clearance have unwittingly been included the publisher will be pleased to make amends at the earliest possible opportunity.Cambridge International Examinations is part of the Cambridge Assessment Group. Cambridge Assessment is the brand name of University of Cambridge Local Examinations Syndicate (UCLES), which is itself a department of the University of Cambridge.Gr o u p140C eC e r i u m 58141P rP r a s e o d y m i u m 59144N d N e o d y m i u m 60P mP r o m e t h i u m61150S mS a m a r i u m62152E uE u r o p i u m63157G dG a d o l i n i u m64159T bT e r b i u m65162D yD y s p r o s i u m66165H oH o l m i u m67167E rE r b i u m68169T mT h u l i u m69173Y bY t t e r b i u m70175L uL u t e t i u m71232T hT h o r i u m 90P aP r o t a c t i n i u m 91238UU r a n i u m92N pN e p t u n i u m93P uP l u t o n i u m94A mA m e r i c i u m95C mC u r i u m96B kB e r k e l i u m97C fC a l i f o r n i u m98E sE i n s t e i n i u m99F mF e r m i u m100M dM e n d e l e v i u m101N oN o b e l i u m102L rL a w r e n c i u m1031HH y d r o g e n17L iL i t h i u m 323N aS o d i u m 1124M gM a g n e s i u m1240C aC a l c i u m 2045S c S c a n d i u m 2148T i T i t a n i u m2251V V a n a d i u m 2352C r C h r o m i u m 2455M n M a n g a n e s e 2556F e I r o n 2659C o C o b a l t 2759N i N i c k e l 2864C u C o p p e r 2965Z nZ i n c3070G aG a l l i u m3127A lA l u m i n i u m1311B B o r o n 512C C a r b o n614NN i t r o g e n716OO x y g e n819FF l u o r i n e928S iS i i c o n1431PP h o s p h o r u s1532SS u l f u r1635.5C lC h l o r i n e1740A rA r g o n1820N eN e o n104H eH e l i u m273G eG e r m a n i u m3275A sA r s e n i c3379S eS e l e n i u m3480B rB r o m i n e3584K rK r y p t o n3639KP o t a s s i u m 1988S rS t r o n t i u m 3889Y Y t t r i u m 3991Z r Z i r c o n i u m4093N b N i o b i u m 4196M o M o l y b d e n u m 42T c T e c h n e t i u m 43101R u R u t h e n i u m 44103R h R h o d i u m 45106P d P a l l a d i u m 46108A gS i l v e r47112C dC a d m i u m48115I nI n d i u m49119S nT i n50122S bA n t i m o n y51128T eT e l l u r i u m52127II o d i n e53131X eX e n o n54137B aB a r i u m 56139L a L a n t h a n u m 57*178H fH a f n i u m72181T a T a n t a l u m 73184W T u n g s t e n 74186R e R h e n i u m 75190O s O s m i u m 76192I rI r i d i u m 77195P t P l a t i n u m78197A uG o l d79201H gM e r c u r y80204T lT h a l l i u m81207P bL e a d82209B iB i s m u t h83P oP o l o n i u m84A tA s t a t i n e85R nR a d o n86F rF r a n c i u m 87227A cA c t i n i u m899B eB e r y l l i u m4II I I I II V V V I V I I 085R bR u b i d i u m 37133C sC a e s i u m 55226R a R a d i u m 88T h e v o l u m e o f o n e m o l e o f a n y g a s i s 24d m 3a t r o o m t e m p e r a t u r e a n d p r e s s u r e (r .t .p .).a Xb a = r e l a t i v e a t o m ic m a s sX = a t o m i c s y m b o lb = p r o t o n (a t o m ic ) n u m b e rK e y *58-71 L a n t h a n o i d s e r i e s 90-103 A c t i n o i d s e r i e s D A T A S H E E T T h e P e r i o d i c T a b l e o f t h e E l e m e n t sPMT。

九天国际教育GCSE真题June 2010 (v3) QP - Paper 1 CIE Chemistry IGCSE

This document consists of 15 printed pages and 1 blank page.IB10 06_0620_13/RP© UCLES 2010[Turn over*1150134897*UNIVERSITY OF CAMBRIDGE INTERNATIONAL EXAMINATIONS International General Certificate of Secondary EducationCHEMISTRY 0620/13Paper 1 Multiple Choice May/June 201045 MinutesAdditional Materials: Multiple Choice Answer Sheet Soft clean eraserSoft pencil (type B or HB is recommended)READ THESE INSTRUCTIONS FIRSTWrite in soft pencil.Do not use staples, paper clips, highlighters, glue or correction fluid.Write your name, Centre number and candidate number on the Answer Sheet in the spaces provided unless this has been done for you.There are forty questions on this paper. Answer all questions. For each question there are four possibl e answers A , B , C and D .Choose the one you consider correct and record your choice in soft pencil on the separate Answer Sheet.Read the instructions on the Answer Sheet very carefully.Each correct answer will score one mark. A mark will not be deducted for a wrong answer. Any rough working should be done in this booklet. A copy of the Periodic Table is printed on page 16. You may use a calculator.© UCLES 2010 0620/13/M/J/101 The diagram shows a cup of tea.Which row describes the water particles in the air above the cup compared with the water particles in the cup?moving fastercloser togetherA B C D2 Which row shows the change that takes place when element X gains the new particle shown?particle gained changeA electronan isotope of element X is formedB electron the element one place to the right of X in the Periodic Table is formedC proton an isotope of element X is formedDprotonthe element one place to the right of X in the Periodic Table is formed3 The symbols of two atoms may be written as shown.X 5223Y5224Which statement about these atoms is correct?A They are different elements because they have different numbers of neutrons.B They are different elements because they have different numbers of protons.C They are isotopes of the same element because they have the same nucleon number.D They are isotopes of the same element because they have the same proton number.© UCLES 2010 0620/13/M/J/10[Turn over4 The diagram shows an atom.electronnucleus containing nine particlesWhat is the proton number and neutron number of the atom?proton numberneutron numberA 4 5B 4 9C 5 4 D5 95 A frui t dri nk coloured orange contai ns a di ssolved mi xture of red and yellow colouri ng agents.One of these colouring agents is suspected of being illegal.Which method could be used to show the presence of this illegal colouring agent?A chromatographyB distillationC evaporationD filtration6 A student carries out an experiment to find how fast 3 cm pieces of magnesium ribbon dissolve in 10 cm 3 samples of sulfuric acid at different temperatures.Which piece of apparatus does the student not need? A balanceB measuring cylinderC stop-clockD thermometer© UCLES 2010 0620/13/M/J/10The electrolytes are listed below.cell 1 aqueous sodium chloride cell 2concentrated hydrochloric acid cell 3molten lead(II ) bromideIn which cells is a gas formed at both electrodes? A 1 and 2B 1 and 3C2 onlyD 3 only8 The diagram shows apparatus for plating a spoon with silver.Which statement is not correct?A Silver would stick to the spoon because it is a very reactive metal.B The electrolyte would be a silver salt dissolved in water.C The metal electrode would be made from silver.D The spoon would be connected to the negative of the power supply.9 Aqueous copper(II ) sulfate solution is electrolysed using inert electrodes.Copper(II ) i ons (Cu 2+), hydrogen i ons (H +), hydroxi de i ons (OH –) and sulfate i ons (−24SO ) are present in the solution.To which electrodes are the ions attracted during this electrolysis?attracted to anodeattracted to cathodeA Cu 2+ and H + OH – and −24SOB Cu 2+ and −24SOH + and OH –C H + and OH – Cu 2+ and −24SOD OH – and −24SO Cu 2+ and H +© UCLES 2010 0620/13/M/J/10[Turn over10 In which compounds are pairs of electrons shared between atoms?1 sodium chloride2 me t hane3 lead bromideA 1 onlyB 2 onlyC 1 and 3D 1, 2 and 311 Element X has six electrons in its outer shell.= electronkeyeHow could the element react?A by gaining two electrons to form a positive ionB by losing six electrons to form a negative ionC by sharing two electrons with two electrons from another element to form two covalent bondsD by sharing two electrons with two electrons from another element to form four covalent bonds12 Hydrogen and chlorine react as shown.1 molecule of hydrogen + 1 molecule of chlorine →2 moleculesof hydrogen chlorideWhat is the equation for this reaction?A 2H + 2C l → 2HC lB 2H + 2C l → H 2C l 2 C H 2 + C l 2 → 2HC lD H 2 + C l 2 → H 2C l 213Which name is given to mixtures of metals?A alloysB compoundsC oresD salts14Iron is extracted from iron oxide using carbon monoxide as shown in the equation.iron oxide + carbon monoxide → iron + carbon dioxide What does the equation show?A Carbon monoxide is oxidised to carbon dioxide.B Carbon monoxide is reduced to carbon dioxide.C Iron is oxidised to iron oxide.D Iron oxide is oxidised to iron.15 A student investigates the rate of reaction between marble chips and hydrochloric acid.The loss in mass of the reaction flask is measured.The graph shows the results of two experiments, P and Q.mass ofreaction flaskWhich change explains the difference between P and Q?A A catalyst is added in P.B A higher temperature is used in P.C Bigger marble chips are used in Q.D Hydrochloric acid is more concentrated in Q.© UCLES 2010 0620/13/M/J/10© UCLES 2010 0620/13/M/J/10[Turn over16cloudsseawater vapourWha t is the energy cha nge a nd wha t na me is given to the type of cha nge when wa ter evaporates?energy change type of change A energy given out endothermic B energy given out exothermic C energy taken in endothermic Denergy taken inexothermic17 Which process is not exothermic?A burning a fossil fuelB obtaining lime from limestoneC radioactive decay of 235UD reacting hydrogen with oxygen18 When pink cobalt(II ) sulfate crystals are heated, they form steam and a blue solid.When water is added to the blue solid, it turns pink and becomes hot.Which terms describe the pink cobalt(II ) sulfate crystals and the reactions?pink cob alt sulf a tere a ctionsA a queous irreversibleB a queous reversibleC hydr a ted irreversibleD hydr a ted reversible19 An element melts at 1455°C, has a density of 8.90g/cm3 and forms a green chloride.Where in the Periodic Table is this element found?A BCD20An excess of copper(II) oxide is a dded to dilute sulfuric a cid to ma ke crysta ls of hydra ted copper(II) sulfate.The processes listed may be used to obtain crystals of hydrated copper(II) sulfate.1 concentrate the resulting solution2 filter3 heat the crystals4 wash the crystalsWhich processes are needed and in which order?A1, 2, 3 and 4B1, 2, 4 and 3C2, 1, 2 and 3D2, 1, 2 and 421 Which is not a property of Group I metals?A They are soft and can be cut with a knife.B They corrode rapidly when exposed to oxygen in the air.C They produce an acidic solution when they react with water.D They react rapidly with water producing hydrogen gas.© UCLES 2010 0620/13/M/J/1022Aqueous sodium hydroxide is added to a solid, X, and the mixture is heated.A green precipitate is formed and an alkaline gas is given off.Which ions are present in X?NH and Fe2+A +4NH and Fe3+B +4C OH– and Fe2+D OH– and Fe3+23An aqueous solution of the organic compound methylamine has a pH greater than 7.Which statement about methylamine is correct?A It neutralises an aqueous solution of sodium hydroxide.B It reacts with copper(II) carbonate to give carbon dioxide.C It reacts with hydrochloric acid to form a salt.D It turns blue litmus red.24The positions in the Periodic Table of four elements are shown.Which element is most likely to form an acidic oxide?ABCD© UCLES 2010 0620/13/M/J/10 [Turn overgas XWhat is gas X?A carbon dioxideB chlorineC hydrogenD oxygen26 A student added dilute hydrochloric acid to four metals and recorded the results.Not all of the results are correct.resultsmetal gas given off1 copper yes2 iron yes3 magnesium no4 zinc yesWhich two results are correct?A 1 and 3B 1 and 4C 2 and 3D 2 and 4© UCLES 2010 0620/13/M/J/1027An element does not conduct electricity and exists as diatomic molecules.In which area of the Periodic Table is the element to be found?BA C D28Copper, iron and zinc are all used as pure metals.Which of these three metals are also used in alloys?co pper iro n zincABCD29Solutions of a halogen and a sodium halide are mixed.Which mixture darkens in colour because a reaction occurs?A bromine and sodium chlorideB bromine and sodium fluorideC chlorine and sodium fluorideD chlorine and sodium iodide30Some properties of four elements are shown in the table.Which element is a metal?melting point/°C electrical conductivitywhen liquidelectrical conductivitywhen solidA –7 lo w lo w B 801 high lo wC 1535 high highD 3550 lo w lo w31The diagram shows three types of item.cutlery cooking pan instruments used in hospitalsWhich method of rust prevention can be used for all three types of item?A coating with plasticB covering with greaseC galvanisingD using stainless steel32Aluminium is an important metal with many uses.Some of its properties are listed.1It is a good conductor of heat.2It is a reactive metal.3It has a low density.4It has an oxide layer that prevents corrosion.Which set of properties help to explain the use of aluminium for cooking and storing food?A 1, 2 and 3B 1, 2 and 4C 1, 3 and 4D 2, 3 and 433To grow roses, a fertiliser containing nitrogen, phosphorus and potassium is needed.For the best flowers, the fertiliser should contain a high proportion of potassium.Which fertiliser is best for roses?proportion by massfertiliserN P KA 9 0 25B 13 13 20C 29 5 0D 29 15 534Which statements about water are correct?1 Water is treated with chlorine to kill bacteria.2 Household water may contain salts in solution.3 Water is used in industry for cooling.4 Water for household use is filtered to remove soluble impurities.A1, 2 and 3 B 1 and 4 C2, 3 and 4 D1, 2, 3 and 435Which statement about methane is not correct?A It is a liquid produced by distilling petroleum.B It is produced as vegetation decomposes.C It is produced by animals such as cows.D It is used as a fuel.36 Which compound in polluted air can damage stonework and kill trees?A carbon dioxideB carbon monoxideC lead compo u ndsD s u lf u r dioxide37Diesel, petrol and bitumen are allA fuels.B hydrocarbons.C lubricants.D waxes.38 A macromolecule is a very large molecule.Macromolecules can be made by joining smaller molecules together. This is called polymerisation.Which row in the table describes the formation of a polymer?monomer polymerA ethane poly(ethane)B ethene poly(ethene)C ethane poly(ethene) Dethene poly(ethane)39 Which structure shows a compound that belongs to a different homologous series to propane?A B C DCC HH H H HC H HHHC H HHC C C H HH HH HHC H H HCC C H H H H H HHHH40Which structure is incorrect ?HH H HHHC C C A HH H HHHC C BHH O HOC CHD HH H HOC C HHBLANK PAGE16Per mission to r epr oduce items wher e thir d-par ty owned mater ial pr otected by copyr ight is included has been sought and clear ed wher e possible. Ever y reasonable effort has been made by the publisher (UCLES) to trace copyright holders, but if any items requiring clearance have unwittingly been included, the publisher will be pleased to make amends at the earliest possible opportunity.University of Cambridge International Examinations is part of the Cambridge Assessment Group. Cambridge Assessment is the brand name of University of Cambridge Local Examinations Syndicate (UCLES), which is itself a department of the University of Cambridge. G r o u p140C eC e r i u m 58141P rP r a s e o d y m i u m 59144N d N e o d ym i u m 60P mP r o m e t h i u m61150S mS a m a r i u m62152E uE u r o p i u m63157G dG a d o l i n i u m64159T bT e r b i u m65162D yD y s p r o s i u m66165H oH o l m i u m67167E rE r b i u m68169T mT h u l i u m69173Y bY t t e r b i u m70175L uL u t e t i u m71232T hT h o r i u m 90P aP r o t a c t i n i u m 91238UU r a n i u m92N pN e p t u n i u m93P uP l u t o n i u m94A mA m e r i c i u m95C mC u r i u m96B kB e r k e l i u m97C fC a l i f o r n i u m98E sE i n s t e i n i u m99F mF e r m i u m100M dM e n d e l e v i u m101N oN o b e l i u m102L rL a w r e n c i u m1031HH y d r o g e n17L iL i t h i u m 323N aS o d i u m 1124M gM a g n e s i u m1240C aC a l c i u m 2045S c S c a n d i u m 2148T i T i t a n i u m2251V V a n a d i u m 2352C r C h r o m i u m 2455M n M a n g a n e s e 2556F e I r o n 2659C o C o b a l t 2759N i N i c k e l 2864C u C o p p e r 2965Z n Z i n c3070G aG a l l i u m3127A l A l u m i n i u m1311B B o r o n 512C C a r b o n614NN i t r o g e n716OO x y g e n819FF l u o r i n e928S iS i l i c o n1431PP h o s p h o r u s1532SS u l f u r1635.5C lC h l o r i n e1740A rA r g o n1820N eN e o n104H eH e l i u m273G eG e r m a n i u m3275A sA r s e n i c3379S eS e l e n i u m3480B rB r o m i n e3584K rK r y p t o n3639KP o t a s s i u m 1988S rS t r o n t i u m 3889Y Y t t r i u m 3991Z r Z i r c o n i u m4093N b N i o b i u m 4196M o M o l y b d e n u m 42T c T e c h n e t i u m 43101R u R u t h e n i u m 44103R h R h o d i u m 45106P d P a l l a d i u m 46108A g S i l v e r47112C dC a d m i u m48115I nI n d i u m49119S nT i n50122S bA n t i m o n y51128T eT e l l u r i u m52127II o d i n e53131X eX e n o n54137B aB a r i u m 56139L a L a n t h a n u m 57*178H fH a f n i u m72181T a T a n t a l u m 73184W T u n g s t e n 74186R e R h e n i u m 75190O s O s m i u m 76192I rI r i d i u m 77195P t P l a t i n u m78197A uG o l d79201H gM e r c u r y80204T lT h a l l i u m81207P bL e a d82209B iB i s m u t h83P oP o l o n i u m84A tA s t a t i n e85R nR a d o n86F rF r a n c i u m 87227A cA c t i n i u m899B eB e r y l l i u m4II I I I II V V V I V I I 085R bR u b i d i u m 37133C sC a e s i u m 55226R a R a d i u m 88T h e v o l u m e o f o n e m o l e o f a n y g a s i s 24d m 3a t r o o m t e m p e r a t u r e a n d p r e s s u r e (r .t .p .).a Xb a = r e l a t i v e a t o m ic m a s sX = a t o m i c s y m b o lb = p r o t o n (a t o m ic ) n u m b e rK e y *58-71 L a n t h a n o i d s e r i e s 90-103 A c t i n o i d s e r i e s D A T A S H E E T T h e P e r i o d i c T a b l e o f t h e E l e m e n t sPMT。

九天国际教育GCSE真题November 2016 (v3) QP - Paper 5 CIE Chemistry IGCSE

READ THESE INSTRUCTIONS FIRSTWrite your Centre number, candidate number and name on all the work you hand in.Write in dark blue or black pen.You may use an HB pencil for any diagrams or graphs.Do not use staples, paper clips, glue or correction fluid.DO NOT WRITE IN ANY BARCODES.Answer all questions.Electronic calculators may be used.You may lose marks if you do not show your working or if you do not use appropriate units.Practical notes are provided on pages 11 and 12.At the end of the examination, fasten all your work securely together.The number of marks is given in brackets [ ] at the end of each question or part question.CHEMISTRY0620/53Paper 5 Practical TestOctober/November 20161 hour 15 minutesCandidates answer on the Question Paper.Additional Materials:As listed in the Confidential InstructionsCambridge International ExaminationsCambridge International General Certificate of Secondary EducationThis document consists of 9 printed pages and 3 blank pages.[Turn overIB16 11_0620_53/2RP © UCLES 2016The syllabus is approved for use in England, Wales and Northern Ireland as a Cambridge International Level 1/Level 2 Certificate.For Examiner’s Use Total1Y ou are going to investigate what happens when two different metals, iron and magnesium, react with aqueous copper(II) sulfate.R ead all the instructions carefully before starting the experiments.I nstructionsY ou are going to carry out two experiments.(a)Experiment 1U se a measuring cylinder to pour 25 cm3 of aqueous copper(II) sulfate into the polystyrenecup provided. Put the polystyrene cup into a 250 cm3 beaker for support. Measure the initialtemperature of the solution and then the temperature after 30 seconds and 60 seconds. Recordyour results in the table.A t 60 seconds add all of the iron to the aqueous copper(II) sulfate and stir the mixturecontinuously with the thermometer.M easure the temperature of the mixture every 30 seconds for 300 seconds (5 minutes). Recordyour results in the table.time / s0306090120150180210240270300 temperature/ °C[2](b)Experiment 2E mpty the polystyrene cup and rinse it with water.U se a measuring cylinder to pour 25 cm3 of aqueous copper(II) sulfate into the polystyrenecup. Put the polystyrene cup into a 250 cm3 beaker for support. Measure the initial temperatureof the solution and then the temperature after 30 seconds and 60 seconds. Record your resultsin the table.A t 60 seconds add all of the magnesium to the aqueous copper(II) sulfate and stir the mixturecontinuously with the thermometer.M easure the temperature of the mixture every 30 seconds for 300 seconds (5 minutes). Recordyour results in the table.time / s0306090120150180210240270300 temperature/ °C[2](c) P lot the results for Experiments 1 and 2 on the grid and draw two smooth line graphs.C learly label the graphs.908070605040302010060120180time / stemperature / °C240300360[4](d) (i) F rom your graph , deduce the temperature of the mixture in Experiment 1 after135 seconds.S how clearly on the grid how you worked out your answer............................................ °C [2](ii) F rom your graph , deduce the time taken for the temperature of the mixture in Experiment 2 to change by 30 °C after the magnesium was added .S how clearly on the grid how you worked out your answer.............................................. s [2](e)P redict the temperature of the mixture in Experiment 2 after one hour. Explain your answer..................................................................................................................................................... (2)(f)S uggest an advantage of taking the temperature readings every 15 seconds..................................................................................................................................................... (2)(g)E xplain why a polystyrene cup is used in the experiments and not a copper can..................................................................................................................................................... (2)[Total: 18]2Y ou are provided with two solutions, solution Q and solution R.C arry out the following tests on solution Q and solution R, recording all of your observations at eachstage.tests on solution Q(a)D ivide solution Q into four equal portions in four test-tubes. Carry out the following tests.(i)U se pH indicator paper to measure the pH of the first portion of solution Q.pH (1)(ii)A dd a 2 cm strip of magnesium ribbon to the second portion of solution Q. Test the gas given off.R ecord your observations.............................................................................................................................................. (2)(iii) A dd a spatula measure of sodium carbonate to the third portion of solution Q. Test the gas given off.R ecord your observations.............................................................................................................................................. (2)(iv)A dd a few drops of dilute nitric acid and about 1 cm3 of aqueous barium nitrate to the fourth portion of solution Q.R ecord your observations. (1)tests on solution R(b)Divide solution R into four equal portions in four test-tubes. Carry out the following tests.(i)M easure the pH of the first portion of solution R.pH (1)(ii)A dd several drops of aqueous sodium hydroxide to the second portion of solution R and shake the test-tube.T hen add excess aqueous sodium hydroxide to the test-tube.R ecord your observations.............................................................................................................................................. (2)(iii)A dd aqueous silver nitrate to the third portion of solution R and leave to stand for about5 minutes.R ecord your observations.............................................................................................................................................. (2)(iv)A dd a spatula measure of iron(II) sulfate crystals to the fourth portion of solution R and shake the mixture.R ecord your observations. (1)(c)I dentify solution Q. (2)(d)I dentify solution R. (2)[Total: 16]3A liquid cleaner is a mixture of three substances. These substances are shown in the table.name of substance properties of substancewater liquid, boiling point 100 °Csodium carbonate solid, soluble in watersilica solid, insoluble in waterP lan experiments to obtain separate pure samples of each substance from the mixture in the liquid cleaner. You are provided with common laboratory apparatus.................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................... (6)[Total: 6]NOTES FOR USE IN QUALITATIVE ANALYSIS Test for anions aniontesttest resultcarbonate (CO 32–)add dilute acideffervescence, carbon dioxide produced chloride (C l –)[in solution]acidify with dilute nitric acid, then add aqueous silver nitratewhite ppt.bromide (Br –)[in solution]acidify with dilute nitric acid, then add aqueous silver nitratecream ppt.iodide (I –)[in solution]acidify with dilute nitric acid, then add aqueous silver nitrateyellow ppt.nitrate (NO 3–)[in solution]add aqueous sodium hydroxide then aluminium foil; warm carefully ammonia produced sulfate (SO 42–)[in solution]acidify, then add aqueous barium nitratewhite ppt.sulfite (SO 32–)add dilute hydrochloric acid, warm gently and test for the presence of sulfur dioxidesulfur dioxide produced will turn acidified aqueous potassium manganate(VII ) from purple to colourlessTest for aqueous cations cationeffect of aqueous sodium hydroxide effect of aqueous ammonia aluminium (A l 3+)white ppt., soluble in excess giving a colourless solutionwhite ppt., insoluble in excessammonium (NH 4+)ammonia produced on warming –calcium (Ca 2+)white ppt., insoluble in excessno ppt. or very slight white ppt.chromium(III ) (Cr 3+)green ppt., soluble in excess grey-green ppt., insoluble in excess copper (Cu 2+)light blue ppt., insoluble in excess light blue ppt., soluble in excess giving a dark blue solution iron(II ) (Fe 2+)green ppt., insoluble in excess green ppt., insoluble in excess iron(III ) (Fe 3+)red-brown ppt., insoluble in excess red-brown ppt., insoluble in excess zinc (Zn 2+)white ppt., soluble in excess giving a colourless solutionwhite ppt., soluble in excess, giving a colourless solutionPermission to reproduce items where third-party owned material protected by copyright is included has been sought and cleared where possible. Every reasonable effort has been made by the publisher (UCLES) to trace copyright holders, but if any items requiring clearance have unwittingly been included, the publisher will be pleased to make amends at the earliest possible opportunity.To avoid the issue of disclosure of answer-related information to candidates, all copyright acknowledgements are reproduced online in the Cambridge International Examinations Copyright Acknowledgements Booklet. This is produced for each series of examinations and is freely available to download at after the live examination series.Cambridge International Examinations is part of the Cambridge Assessment Group. Cambridge Assessment is the brand name of University of Cambridge Local Examinations Syndicate (UCLES), which is itself a department of the University of Cambridge.Test for gases Flame tests for metal ions gastest and test resultsmetal ion flame colour ammonia (NH 3)turns damp, red litmus paper bluelithium (Li +)red carbon dioxide (CO 2)turns limewater milky sodium (Na +)yellow chlorine (C l 2)bleaches damp litmus paper potassium (K +)lilac hydrogen (H 2)‘pops’ with a lighted splint copper(II ) (Cu 2+)blue-greenoxygen (O 2)relights a glowing splintsulfur dioxide (SO 2)turns acidified aqueouspotassium manganate(VII ) from purple to colourless。

九天国际教育GCSE真题June 2010 (v3) QP - Paper 5 CIE Chemistry IGCSE

READ THESE INSTRUCTIONS FIRSTWrite your Centre number, candidate number and name on all the work you hand in.Write in dark blue or black pen.You may use a pencil for any diagrams, graphs or rough working.Do not use staples, paper clips, highlighters, glue or correction ﬂ uid.DO NOT WRITE IN ANY BARCODES.Answer all questions.Practical notes are provided on page 8.At the end of the examination, fasten all your work securely together.The number of marks is given in brackets [ ] at the end of each question or part question.CHEMISTRY0620/53Paper 5 Practical TestMay/June 20101 hour 15 minutesCandidates answer on the Question Paper.Additional Materials:As listed in the Con ﬁdential InstructionsUNIVERSITY OF CAMBRIDGE INTERNATIONAL EXAMINATIONS International General Certi ﬁ cate of Secondary EducationThis document consists of 8printed pages.[Turn overIB10 06_0620_53/FP © UCLES 2010*1148265513*For Examiner’s Use Total12For1Y ou are going to investigate the solubility of salt A in water at various temperatures.Examiner’sUse R ead all the instructions below carefully before starting the experiments.InstructionsExperiment 1Y ou are provided with a clean boiling tube containing 12g of A.F ill the burette provided with distilled water and add 10.0cm3 of water to the boiling tube.H eat the mixture of salt A and water carefully until all of the solid has dissolved.Y ou will have to boil the solution gently.R emove the boiling tube from the heat and allow the solution to cool.Stir the solution gently with the thermometer.N ote the temperature at which crystals ﬁ rst appear and record the temperature in thetable.K eep the boiling tube and its contents for the remaining experiments in thisquestion.Experiment 2F rom the burette, add 2.0cm3 more of the water into the boiling tube and contents fromExperiment 1.R epeat the experiment exactly as before to ﬁnd the temperature at which crystals ﬁ rstappear.I t may help if the boiling tube is dipped for short periods of time in a beaker of cold water tospeed up the cooling.R ecord, in the table, the total volume of water in the boiling tube and the temperature atwhich crystals ﬁ rst appear.ForExaminer’sUseExperiment 3 F rom the burette, add 2.0 cm 3 more of the water into the boiling tube and contents fromExperiment 2.R epeat the experiment exactly as before and record, in the table, the total volume of water used and the temperature at which crystals ﬁ rst appear.C ontinue this procedure for Experiment 4 with one more addition of 2.0 cm 3 of water. Note all the results in the table.A t the end of Experiment 4, the total volume of water in the boiling tube will be 16.0 cm 3.Table of resultsexperimenttotal volume of water / cm 3temperature at whichcrystals ﬁ rst appear / °C110.0234[5]ForExaminer’sUse(a) P lot your results on the grid below and draw a straight line graph.t e m p e r a t u r e a t w h i c h c r y s t a l s f i r s t a p p e a r / °Ctotal volume of water / cm 3910111213141516[6]For(b)H ow did you know when salt A was completely dissolved in the water?Examiner’sUse (1)(c)F rom your graph, ﬁ nd the temperature at which crystals of A would ﬁ rst appear if thetotal volume of water in the solution were 9.0cm3.S how clearly on the graph how you worked out your answer............................................................°C [2](d)S alt B is more soluble in water than salt A. Sketch on the grid the graph you wouldexpect for B. Label this graph. [2](e)S uggest, with a reason, how the results would be different if 6g of salt A were usedinstead of 12g............................................................................................................................................ (2)(f)E xplain one improvement you could make to the experimental procedure to obtain moreaccurate results in this investigation.improvement.....................................................................................................................[2]explanation.................................................................................................................[Total: 20]ForExaminer’sUse2 Y ou are provided with solid W and two solutions, X and Y . C arry out the following tests on the solid and the solutions, recording all of your observations in the table.C onclusions must not be written in the table.testsobservationstests on solid W(a) D issolve half of the sample of solid W in about 3 cm 3 of distilled water.A dd a few drops of dilute nitric acid and then aqueous silver nitrate. (2)tests on solution X (b) (i) D escribe solution X .T est a little of solution X with Universal Indicator paper. Record the pH.(ii)T o about 2 cm 3 of solution X , add aqueous sodium hydroxide. (iii)T o about 2 cm 3 of solution X , addaqueous ammonia drop by drop and shake the test-tube.N ow add excess aqueous ammonia solution to the test-tube. (iv)A dd the rest of solid W to about 3 cm 3 of solution X . Stir and leave to stand for 5 minutes. (1)pH ........................................................... [1] ................................................................ [2] ................................................................ [1] ...................................................................... (2)............................................................................................................................................ . (3)tests on solution Y (c) (i)T est a little of solution Y with Universal Indicator paper. Record the pH. (ii)T o about 3 cm 3 of solution Y , add a few drops of dilute hydrochloric acid and then aqueous barium chloride. pH ........................................................... [1] ...................................................................... . (2)For(d)W hat conclusion can you make about solid W?Examiner’sUse (1)(e)W hat conclusions can you make about solution X?........................................................................................................................................... (2)(f)I dentify solution Y. (2)[Total: 20]Permission to reproduce items where third-party owned material protected by copyright is included has been sought and cleared where possible. Every reasonable effort has been made by the publisher (UCLES) to trace copyright holders, but if any items requiring clearance have unwittingly been included the publisher will be pleased to make amends at the earliest possible opportunity.University of Cambridge International Examinations is part of the Cambridge Assessment Group. Cambridge Assessment is the brand name of University of Cambridge Local Examinations Syndicate (UCLES), which is itself a department of the University of Cambridge.NOTES FOR USE IN QUALITATIVE ANALYSISTest for anions aniontesttest resultcarbonate (CO 32–)add dilute acideffervescence, carbon dioxide produced chloride (C l –)[in solution]acidify with dilute nitric acid, then add aqueous silver nitrate white ppt.iodide (I –)[in solution]acidify with dilute nitric acid, then add aqueous silver nitrate yellow ppt.nitrate (NO 3–)[in solution]add aqueous sodium hydroxide then aluminium foil; warm carefully ammonia produced sulfate (SO 42–)[in solution]acidify with dilute nitric acid, then aqueous barium nitratewhite ppt.Test for aqueous cations cationeffect of aqueous sodium hydroxide effect of aqueous ammonia aluminium (A l 3+)white ppt., soluble in excess giving a colourless solutionwhite ppt., insoluble in excess ammonium (NH 4+)ammonia produced on warming –calcium (Ca 2+)white ppt., insoluble in excess no ppt., or very slight white ppt.copper (Cu 2+)light blue ppt., insoluble in excess light blue ppt., soluble in excess giving a dark blue solution iron(II ) (Fe 2+)green ppt., insoluble in excess green ppt., insoluble in excess iron(III ) (Fe 3+)red-brown ppt., insoluble in excess red-brown ppt., insoluble in excess zinc (Zn 2+)white ppt., soluble in excess giving a colourless solutionwhite ppt., soluble in excess giving a colourless solutionTest for gases gastest and test resultsammonia (NH 3)turns damp red litmus paper blue carbon dioxide (CO 2)turns limewater milky chlorine (C l 2)bleaches damp litmus paper hydrogen (H 2)‘pops’ with a lighted splint oxygen (O 2)relights a glowing splint。

九天国际教育GCSE真题November 2010 (v3) QP - Paper 1 CIE Chemistry IGCSE

This document consists of 16 printed pages.IB10 11_0620_13/RP© UCLES 2010[Turn over*8947497463*UNIVERSITY OF CAMBRIDGE INTERNATIONAL EXAMINATIONS International General Certificate of Secondary EducationCHEMISTRY 0620/13Paper 1 Multiple Choice October/November 201045 MinutesAdditional Materials: Multiple Choice Answer Sheet Soft clean eraserSoft pencil (type B or HB is recommended)READ THESE INSTRUCTIONS FIRSTWrite in soft pencil.Do not use staples, paper clips, highlighters, glue or correction fluid.Write your name, Centre number and candidate number on the Answer Sheet in the spaces provided unless this has been done for you.There areforty questions on this paper. Answer all questions. For each question there are four possibl e answers A , B , C and D .Choose the one you consider correct and record your choice in soft pencil on the separate Answer Sheet.Read the instructions on the Answer Sheet very carefully.Each correct answer will score one mark. A mark will not be deducted for a wrong answer. Any rough working should be done in this booklet. A copy of the Periodic Table is printed on page 16. You may use a calculator.© UCLES 2010 0620/13/O/N/101 In which changes do the particles move further apart?W Xgas liquid solidY ZA W and XB W and ZC X and YD Y and Z2 The table shows the structure of different atoms and ions.particleproton numbernucleon numbernumber of protonsnumber of neutronsnumber of electronsMg 12 24 12 W 12 Mg 2+ X 24 12 12 10 F 9 19 9 Y 9 F – 9 19 9 10 ZWhat are the values of W, X, Y and Z?W X YZ A 10 10 9 9 B 10 12 10 9 C 12 10 9 10 D 12 12 10 103 Element X has a nucleon (mass) number of 19 and a proton (atomic) number of 9.To which group in the Periodic Table does it belong?A IB IIIC VIID 04 A mixture of ethanol and methanol are separated by fractional distillation.This method of separation depends on a difference in property X of these two alcohols.What is property X? A boiling point B colour C melting pointD solubility© UCLES 2010 0620/13/O/N/10[Turn over5 Chromatography is used to find out if a banned dye, P, is present in foodstuffs. The results are shown in the diagram.Which foodstuff contains P?A PBC D6 Which diagram does not show the outer shell electrons in the molecule correctly?ABCD© UCLES 2010 0620/13/O/N/107 Two isotopes of hydrogen are H 11 and H 21.Which diagram shows the arrangement of particles in the two isotopes?= a nucleus8 The chemical compositions of two substances, W and X, are given.W Na(A l Si 3)O 8X Ca(A l 2Si 2)O 8Which statements are correct?1 W and X contain the same amount of oxygen.2 W contains three times as much silicon as X. 3X contains twice as much aluminium as W.A 1 and 2B 1 and 3C 2 and 3D 1, 2 and 3X and Y form a covalent compound.What is its formula?A XY5B XY3C XYD X3Y10 Element X is shiny and can be formed into a sheet by hammering.Which row correctly describes the properties of element X?conducts electricity melts below 25°CABCD11Substance X was electrolysed in an electrolytic cell.A coloured gas was formed at the anode and a metal was formed at the cathode.anodeWhat is substance X?A aqueous sodium chlorideB molten lead bromideC molten zinc oxideD solid sodium chloride© UCLES 2010 0620/13/O/N/10 [Turn over© UCLES 2010 0620/13/O/N/10II )bulbThe experiment did not work.What change is needed in the experiment to make it work? A Add solid copper(II ) sulfate to the electrolyte. B Increase the temperature of the electrolyte.C Replace the copper electrode by a carbon electrode.D Reverse the connections to the battery.13 When concentrated sodium chloride solution is electrolysed, elements X and Y are formed.What are X and Y?X YA chlorine hydrogenB hydrogen chlorineC hydrogen oxygenD oxygen hydrogen© UCLES 2010 0620/13/O/N/10[Turn over14 Calcium carbonate was reacted with hydrochloric acid in a conical flask. The flask was placed ona balance and the mass of the flask and contents was recorded as the reaction proceeded.During the reaction, carbon dioxide gas was given off.The reaction was carried out at two different temperatures.Which row is correct?change in masstemperature at which masschanged more quickly A decrease highertemperature B decrease lower temperature C increase highertemperature Dincrease lower temperature15 Which is an endothermic process?A burning hydrogenB distilling petroleum Creacting potassium with waterD using petrol in a motor car engine16 The diagrams show some pieces of laboratory equipment.3thermometer2stop-clock1balanceWhich equipment is needed to find out whether dissolv ing salt in water is an endothermic process? A 1 onlyB 1 and 3C 2 and 3D 3 only17Which reaction will result in a decrease in pH?A adding calcium hydroxide to acid soilB adding citric acid to sodium hydrogen carbonate solutionC adding sodium chloride to silver nitrate solutionD adding sodium hydroxide to hydrochloric acid18When pink crystals of cobalt(II) chloride are heated, steam is given off and the colour of the solid changes to blue.CoC l2.6H2O CoC l2 + 6H2OWhat happens when water is added to the blue solid?colour temperatureA changes to pink decreasesB changes to pink increasesC remains blue decreasesD remains blue increases19The red colour in some pottery glazes may be formed as a result of the reactions shown.CuCO3 CuO + CO2CuO + SnO Cu + SnO2heatThese equations show that ……1…… is oxidised and ……2…… is reduced.Which substances correctly complete gaps 1 and 2 in the above sentence?1 2A CO2 SnO2B CuCO3 CuOC CuO SnOD SnO CuO© UCLES 2010 0620/13/O/N/10© UCLES 2010 0620/13/O/N/10[Turn over20 Some barium iodide is dissolved in water.Aqueous lead(II ) nitrate is added to the solution until no more precipitate forms.This precipitate, X, is filtered off.Dilute sulfuric acid is added to the filtrate and another precipitate, Y, forms.What are the colours of precipitates X and Y?X Y A white white B white yellow C yellow white Dyellow yellow21 The table shows some reactions of the halogens.Which reaction is the most likely to be explosive?reactionchlorine gasbromine gasiodine gasreaction with hydrogen A B C reaction with ironvery vigorousless vigorousD22 Which compound is likely to be coloured?A KMnO 4B KNO 3C K 2CO 3D K 2SO 423 A salt is made by adding an excess of an insoluble metal oxide to an acid.How can the excess metal oxide be removed?A chromatographyB crystallisationC distillationD filtrationWhat is the pH of the acid before the reaction and what type of element is X?pH type of element XA greater than 7 metalB greater than 7 non-metalC less than 7 metalD less than 7 non-metal25The diagram shows the positions of elements P, Q, R, S and T in the Periodic Table.These letters are not the chemical symbols for the elements.S T PQ RWhich statement about the properties of these elements is correct?A P reacts more vigorously with water than does Q.B P, Q and R are all metals.C T exists as diatomic molecules.D T is more reactive than S.© UCLES 2010 0620/13/O/N/1026 The table compares the properties of Group I elements with those of transition elements.Which entry in the table is correct?property Group I elementstransition elementsA catalytic activitylowhighB density high lowC electrical conductivitylow high Dmelting pointhighlow27 Which pollutant, found in car exhaust fumes, does not come from the fuel?A carbon monoxideB hydrocarbonsC lead compoundsD nitrogen oxides28 The diagram shows the materials used in the production of steel from impure iron.What could element X be? A calcium B carbon C nitrogenD sulfur29 Which property do all metals have?A Their boiling points are low.B Their densities are low.C They conduct electricity.D They react with water.30Which diagram could represent the structure of an alloy?A BC D31 Some metals react readily with dilute hydrochloric acid.Some metals can be extracted by heating their oxides with carbon.For which metal are both statements correct?A calciumB copperC ironD magnesium32Which diagram shows a common use of stainless steel?DA BCA to kill bacteria in the waterB to make the water neutralC to make the water taste betterD to remove any salt in the water34 A test-tube containing damp iron wool is inverted in water.After three days, the water level inside the test-tube has risen.Which statement explains this rise?A Iron oxide has been formed.B Iron wool has been reduced.C Oxygen has been formed.D The temperature of the water has risen.35 A bag of fertiliser ‘Watch it grow’ contains ammonium sulfate and potassium sulfate.Which of the three elements N, P and K does ‘Watch it grow’ contain?N P KABCD36 Which information about carbon dioxide and methane is correct?carb o n di o xide methane A formed when vegetation decomposes B greenhouse gas C present in unpolluted airDproduced during respiration37 Ethene reacts with Y to produce ethanol.ethene + Y → ethanolWhat is Y?A hydr o genB o xygenC steamD yeast38 In an oil refinery, crude oil is separated into useful fractions.The diagram shows some of these fractions.refinery gases gasolene Xdiesel YZWhat are fractions X, Y and Z?X Y Z A fuel oil bitumen paraffin (kerosene)B fuel oil paraffin (kerosene)bitumen C paraffin (kerosene) bitumen fuel oil D paraffin (kerosene)fuel oilbitumen39 The diagram shows the structure of a compound.H C H C HHC HO H H C HTo which classes of compound does this molecule belong?alkane alkene alc o h o l A n o n o n o B n o yes yes C yes n o yes Dyes yes yes40 Which structures show compounds that are members of the same homologous series?OC HHC H HC H HHH1HCH HC H HCO OH2HC H HC H HC HH HC 3HC H HC H HC H HC H HOH4A 1 and 2B 1 and 4C 2 and 3D 3 and 416Per mission to r epr oduce items wher e thir d-par ty owned mater ial pr otected by copyr ight is included has been sought and clear ed wher e possible. Ever y reasonable effort has been made by the publisher (UCLES) to trace copyright holders, but if any items requiring clearance have unwittingly been included, the publisher will be pleased to make amends at the earliest possible opportunity.University of Cambridge International Examinations is part of the Cambridge Assessment Group. Cambridge Assessment is the brand name of University of Cambridge Local Examinations Syndicate (UCLES), which is itself a department of the University of Cambridge. G r o u p140C eC e r i u m 58141P rP r a s e o d y m i u m 59144N d N e o d ym i u m 60P mP r o m e t h i u m61150S mS a m a r i u m62152E uE u r o p i u m63157G dG a d o l i n i u m64159T bT e r b i u m65162D yD y s p r o s i u m66165H oH o l m i u m67167E rE r b i u m68169T mT h u l i u m69173Y bY t t e r b i u m70175L uL u t e t i u m71232T hT h o r i u m 90P aP r o t a c t i n i u m 91238UU r a n i u m92N pN e p t u n i u m93P uP l u t o n i u m94A mA m e r i c i u m95C mC u r i u m96B kB e r k e l i u m97C fC a l i f o r n i u m98E sE i n s t e i n i u m99F mF e r m i u m100M dM e n d e l e v i u m101N oN o b e l i u m102L rL a w r e n c i u m1031HH y d r o g e n17L iL i t h i u m 323N aS o d i u m 1124M gM a g n e s i u m1240C aC a l c i u m 2045S c S c a n d i u m 2148T i T i t a n i u m2251V V a n a d i u m 2352C r C h r o m i u m 2455M n M a n g a n e s e 2556F e I r o n 2659C o C o b a l t 2759N i N i c k e l 2864C u C o p p e r 2965Z n Z i n c3070G aG a l l i u m3127A l A l u m i n i u m1311B B o r o n 512C C a r b o n614NN i t r o g e n716OO x y g e n819FF l u o r i n e928S iS i l i c o n1431PP h o s p h o r u s1532SS u l f u r1635.5C lC h l o r i n e1740A rA r g o n1820N eN e o n104H eH e l i u m273G eG e r m a n i u m3275A sA r s e n i c3379S eS e l e n i u m3480B rB r o m i n e3584K rK r y p t o n3639KP o t a s s i u m 1988S rS t r o n t i u m 3889Y Y t t r i u m 3991Z r Z i r c o n i u m4093N b N i o b i u m 4196M o M o l y b d e n u m 42T c T e c h n e t i u m 43101R u R u t h e n i u m 44103R h R h o d i u m 45106P d P a l l a d i u m 46108A g S i l v e r47112C dC a d m i u m48115I nI n d i u m49119S nT i n50122S bA n t i m o n y51128T eT e l l u r i u m52127II o d i n e53131X eX e n o n54137B aB a r i u m 56139L a L a n t h a n u m 57*178H fH a f n i u m72181T a T a n t a l u m 73184W T u n g s t e n 74186R e R h e n i u m 75190O s O s m i u m 76192I rI r i d i u m 77195P t P l a t i n u m78197A uG o l d79201H gM e r c u r y80204T lT h a l l i u m81207P bL e a d82209B iB i s m u t h83P oP o l o n i u m84A tA s t a t i n e85R nR a d o n86F rF r a n c i u m 87227A cA c t i n i u m899B eB e r y l l i u m4II I I I II V V V I V I I 085R bR u b i d i u m 37133C sC a e s i u m 55226R a R a d i u m 88T h e v o l u m e o f o n e m o l e o f a n y g a s i s 24d m 3a t r o o m t e m p e r a t u r e a n d p r e s s u r e (r .t .p .).a Xb a = r e l a t i v e a t o m ic m a s sX = a t o m i c s y m b o lb = p r o t o n (a t o m ic ) n u m b e rK e y *58-71 L a n t h a n o i d s e r i e s 90-103 A c t i n o i d s e r i e s D A T A S H E E T T h e P e r i o d i c T a b l e o f t h e E l e m e n t sPMT。

九天国际教育GCSE真题June 2017 (v3) QP - Paper 4 CIE Chemistry IGCSE

The syllabus is approved for use in England, Wales and Northern Ireland as a Cambridge International Level 1/Level 2 Certificate.
This document consists of 14 printed pages and 2 blank pages.
Use the bond energies in the table to calculate the energy change, ΔH, for the reaction. C–H bond energy in kJ / mol 412 C–C 348 Br–Br 193 C–Br 285 C=C 611
0620/43 May/June 2017 1 hour 15 minutes
Candidates answer on the Question Paper. No Additional Materials are required. READ THESE INSTRUCTIONS FIRST Write your Centre number, candidate number and name on all the work you hand in. Write in dark blue or black pen. You may use an HB pencil for any diagrams or graphs. Do not use staples, paper clips, glue or correction fluid. DO NOT WRITE IN ANY BARCODES. Answer all questions. Electronic calculators may be used. A copy of the Periodic Table is printed on page 16. You may lose marks if you do not show your working or if you do not use appropriate units. At the end of the examination, fasten all your work securely together. The number of marks is given in brackets [ ] at the end of each question or part question.

九天国际教育GCSE真题June 2016 (R) QP - Paper 1C Edexcel Chemistry IGCSE

Turn over P45943A©2016 Pearson Education Ltd.1/1/1/1/1/1/*P45943A0132*Instructions• Use black ink or ball-point pen.•Fill in the boxes at the top of this page with your name,centre number and candidate number.• Answer all questions.•A nswer the questions in the spaces provided– there may be more space than you need.•Show all the steps in any calculations and state the units.•Information•The total mark for this paper is 120.•T he marks for each question are shown in brackets– use this as a guide as to how much time to spend on each question.Advice•Read each question carefully before you start to answer it.•Write your answers neatly and in good English.•Try to answer every question.•Check your answers if you have time at the end.2*P45943A0232*DO NOT WRITE IN THIS AREA DO NOT WRITE IN THIS AREA DO NOT WRITE IN THIS AREA3*P45943A0332*Turn overD O N O T W R I TE I N T H I S A R E AD O N O T W R I TE I N T H I S A R E AD O N O T W R I TE I N T H I S A R E AAnswer ALL questions.1 The Periodic Table is shown on page 2.(a) In the Periodic Table, which number increases from 3 to 10 in Period 2?(1)....................................................................................................................................................................................................................................................................................(b) In the Periodic Table, which number increases from 9 to 226 in Group 2?(1)....................................................................................................................................................................................................................................................................................(c) An atom of boron contains protons, neutrons and electrons. Use words from the box to complete the sentences.Your may use each word once, more than once or not at all.protons neutrons electrons(i) The particles with the smallest mass are ............................................................................................ .(1)(ii) The particles with a negative charge are ............................................................................................ .(1)(iii) The two types of particle in the nucleus of a boron atom(1)are............................................................................................ and ............................................................................................ .(iv) In a boron atom there are equal numbers of(1)............................................................................................and ............................................................................................ .(v) The element boron has isotopes.(1)These isotopes have different numbers of ............................................................................................ .(Total for Question 1 = 7 marks)4*P45943A0432*DO NOT WRITE IN THIS AREADO NOT WRITE IN THIS AREADO NOT WRITE IN THIS AREA5*P45943A0532*Turn overD O N O T W R I TE I N T H I S A R E AD O N O T W R I TE I N T H I S A R E AD O N O T W R I TE I N T H I S A R E A3Techniques used in the separation of mixtures include A crystallisation B filtrationC fractional distillationD simple distillationFor each separation, select the most suitable technique, A, B, C or D, used to obtain the first named substance from the mixture.Each letter may be used once, more than once or not at all.(a) Pure water from sea water(1)....................................................................................................................................................................................................................................................................................(b) Ethanol from a mixture of ethanol and water(1)....................................................................................................................................................................................................................................................................................(c) Calcium carbonate from a mixture of calcium carbonate and water(1)....................................................................................................................................................................................................................................................................................(d ) CuSO 4.5H 2O(s) from CuSO 4(aq)(1)....................................................................................................................................................................................................................................................................................(Total for Question 3 = 4 marks)6*P45943A0632*DO NOT WRITE IN THIS AREADO NOT WRITE IN THIS AREADO NOT WRITE IN THIS AREA7*P45943A0732*Turn overD O N O T W R I TE I N T H I S A R E AD O N O T W R I TE I N T H I S A R E A D O N O T W R I T E I N T H I S A R E A8*P45943A0832*DO NOT WRITE IN THIS AREADO NOT WRITE IN THIS AREADO NOT WRITE IN THIS AREA9*P45943A0932*Turn overD O N O T W R I TE I N T H I S A R E AD O N O T W R I TE I N T H I S A R E AD O N O T W R I TE I N T H I S A R E A10*P45943A01032*DO NOT WRITE IN THIS AREADO NOT WRITE IN THIS AREADO NOT WRITE IN THIS AREA(c) One of the pigments present in the vegetable extracts is not shown in thechromatogram. It appears as a very faint spot 1.3 cm above the starting line.Calculate its R f value using the expressionR f distance travelled by pigmentdistance travelled by solv =e nt(2)R f = .....................................(d) Suggest a reason why there is a spot on the starting line in the chromatogram forsweet potatoes.(1)........................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................(Total for Question 5 = 9 marks)D O N O T W R I TE I N T H I S A R E A D O N O T W R I T E I N T H I S A R E A D O N O T W R I T E I N T H I S A R E ABLANK PAGEDO NOT WRITE IN THIS AREADO NOT WRITE IN THIS AREADO NOT WRITE IN THIS AREA6Hydrogen chloride is formed in the reaction between hydrogen and chlorine.The equation for the reaction isH 2 + Cl 2 o 2HCl(a) Each molecule in this equation contains the same type of bonding.Name this type of bonding.(1)....................................................................................................................................................................................................................................................................................(b) The bonding in a hydrogen molecule is strong.Explain why the boiling point of hydrogen is low.(2)................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................(c) Explain how the two atoms in a chlorine molecule are held together.(2)................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................(d) Draw a dot and cross diagram to show the bonding in a hydrogen chloride molecule.Show only the outer electrons in each atom.(2)D O N O T W R I TE I N T H I S A R E AD O N O T W R I TE I N T H I S A R E AD O N O T W R I TE I N T H I S A R E A(e)Hydrogen chloride gas dissolves in water to form solution A. Hydrogen chloride gas dissolves in methylbenzene to form solution B. A teacher adds a piece of magnesium ribbon to each solution.Explain why she observes effervescence with solution A but not with solution B.(3)........................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................(Total for Question 6 = 10 marks)DO NOT WRITE IN THIS AREADO NOT WRITE IN THIS AREADO NOT WRITE IN THIS AREA7The table shows the displayed formulae of some organic compounds.AHC HH HBH C CC HH H HH CH C C C HHHH H H H DHCC C CHH H H H H H H HEH C C CC HH H HH H HFHC C H H H H HH C C H(a) Explain why all of these compounds are described as hydrocarbons.(2)................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................(b) Why are B and E described as unsaturated?(1)........................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................(c) Which letter represents the first member of the homologous series of alkanes?(1)....................................................................................................................................................................................................................................................................................(d) Which letters represent compounds that have the empirical formula CH 2?(2)....................................................................................................................................................................................................................................................................................D O N O T W R I TE I N T H I S A R E AD O N O T W R I TE I N T H I S A R E AD O N O T W R I TE I N T H I S A R E A(e) Compound F has the same general formula as an alkene.Why does F not decolourise bromine water?(1)........................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................(f) One of the compounds in the table reacts with bromine to form G, a compoundwith the composition by mass C = 22.2%, H = 3.7%, Br = 74.1%.(i) Show, by calculation, that the empirical formula of G is C 2H 4Br(3)(ii) The relative formula mass of G is 216Deduce the molecular formula of G.(2)molecular formula ..........................................................................(Total for Question 7 = 12 marks)DO NOT WRITE IN THIS AREADO NOT WRITE IN THIS AREADO NOT WRITE IN THIS AREAD O N O T W R I TE I N T H I S A R E AD O N O T W R I TE I N T H I S A R E AD O N O T W R I TE I N T H I S A R E ADO NOT WRITE IN THIS AREADO NOT WRITE IN THIS AREADO NOT WRITE IN THIS AREA9A student investigates the reactions between acids and alkalis. He uses thisapparatus to measure the temperature change in the reaction between dilute hydrochloric acid (HCl) and aqueous sodium hydroxide (NaOH).This is his method. • add 25 cm 3 of dilute hydrochloric acid to the polystyrene cup and record thesteady temperature • add some aqueous sodium hydroxide and stir the mixture • record the maximum temperature of the mixtureThe student repeats the experiment using different volumes of aqueous sodium hydroxide.(a) What is the advantage of using a polystyrene cup rather than a glass beaker?(1)........................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................polystyrene cupD O N O T W R I TE I N T H I S A R E AD O N O T W R I TE I N T H I S A R E AD O N O T W R I TE I N T H I S A R E ADO NOT WRITE IN THIS AREADO NOT WRITE IN THIS AREADO NOT WRITE IN THIS AREAD O N O T W R I TE I N T H I S A R E AD O N O T W R I TE I N T H I S A R E AD O N O T W R I TE I N T H I S A R E A(ii) For the point where the lines cross, write down(2)the temperature of the mixture = ...............................................°Cthe volume of aqueous sodium hydroxide = ...............................................cm 3(d) In a similar experiment, using a different acid and alkali, the student records these results. volume of dilute sulfuric acid = 25.0 cm 3volume of aqueous potassium hydroxide = 22.7 cm 3 initial temperature of each solution = 18.9 °Cfinal temperature of mixture = 24.7 °CCalculate the heat energy change during this reaction using this equation.heat energy change = mass × 4.2 × temperature changeAssume that 1.0 cm 3 of each solution has a mass of 1.0 g.(3)heat energy change = ..........................................................................J(Total for Question 9 = 13 marks)DO NOT WRITE IN THIS AREADO NOT WRITE IN THIS AREADO NOT WRITE IN THIS AREAD O N O T W R I TE I N T H I S A R E AD O N O T W R I TE I N T H I S A R E AD O N O T W R I TE I N T H I S A R E ADO NOT WRITE IN THIS AREADO NOT WRITE IN THIS AREADO NOT WRITE IN THIS AREAD O N O T W R I TE I N T H I S A R E AD O N O T W R I TE I N T H I S A R E AD O N O T W R I TE I N T H I S A R E A(ii) The student wrote this explanation for the shape of the graph.As the temperature increases, the rate of reaction increases.This is because there are more frequent collisions between particles of reactants.Use the particle collision theory to explain another more important reason for the increase in reaction rate.(2)................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................(e) Another student uses the same reaction to investigate the effect of changing theconcentration of the sodium thiosulfate solution on the rate of reaction.Give three variables that the student must control in this investigation to obtain valid results.(3)1 ...................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................2 ....................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................3 ....................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................(Total for Question 10 = 15 marks)DO NOT WRITE IN THIS AREADO NOT WRITE IN THIS AREADO NOT WRITE IN THIS AREA11The flow diagram shows how a fertiliser is manufactured from raw materials.The hydrogen needed is formed in two reactions.(a) Reaction 1 occurs between steam and methane in natural gas.Balance the equation for this reaction.(1)..........................CH 4 + ..........................H 2O o ..........................CO + ..........................H 2(b) The equation for reaction 2 isCO(g) + H 2O(g) U CO 2(g) + H 2(g ¨H = –41 kJ/mol(i) Assuming that this reaction reaches equilibrium, explain what happens to theyield of hydrogen if the reaction is carried out at a higher pressure but at the same temperature.(2)................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................(ii) Assuming that this reaction reaches equilibrium, explain what happens to theyield of hydrogen if the reaction is carried out at a higher temperature but at the same pressure.(2)................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................airnatural gas water carbon dioxide hydrogen nitrogen oxygenammonia nitric acidammonium nitrateD O N O T W R I TE I N T H I S A R E A D O N O T W R I T E I N T H I S A R E AD O N O T W R I TE I N T H I S A R E A(c) Reaction 2 can be represented on an energy profile.(i) Complete the profile by showing the products of the reaction and theenthalpy change for the reaction.(2)(ii) Reaction 2 is carried out using an iron oxide catalyst.State the effect, if any, of using a catalyst on the enthalpy change for the reaction.(1)........................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................(iii) Explain how a catalyst increases the rate of a reaction.(2)................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................energyCO + H 2O。