2011无机化学原理(英语)A试卷郑州大学

Term-end Examination of Inorganic Chemistry (A) (The first semester of the academic year of 2011-2012)

Reviewer 1： Reviewer 21. Multiple-Choice Questions (30 marks)

(1) Which is an (are) element(s)? (i) CO, (ii) Co, (iii) C, (iv) Cl 22(a) only iii (b) iii and iv (c) i and v (d) ii, iii and iv (e) ii and iii

(2) Which is a molecular compound?

(a) KI (b) Fe(NO 3)2 (c) H 2S (d) Na 2S (e) O 2

(3) Which is the symbol for the SI base unit of mass

(a) m; (b) g; (c) kg; (d) gr; (e) mol

(4) Which term can correctly be applied to the reaction Zn(s) + 2HCl(aq) → ZnCl 2(aq) +

H 2(g)?

(a) double replacement (b) neutralization (c) decomposition (d) combination (e) single replacement

(5) Electricity is carried through a solution of an electrolyte by

(a) electrons only (b) anions only (c) cations only (d) both cations and anions (e)both electrons and ions.

(6) At the same temperature and pressure, molecules of which of the following have the highest

average speed?

(a) Br 2(g) (b) Cl 2(g) (c) F 2(g) (d) I 2(g)

(7) Which of the four gases behaves ideally?

(a) 1 (b) 2 (c) 3 (d) 4

(8) Light is given off by a sodium vapor streetlight when

(a) electrons move from a given energy level to a higher energy level

(b) electrons are removed from atoms and cations are formed.

(c) electrons move from a given energy level to a lower energy level

(d) electrons are added to atoms and anions are formed

(e) atoms combine to form molecules

(9) The electrons in which subshell experience the largest effective nuclear charge in a

multielectron?

(a) 4s (b) 4p (c) 4d (d) 4f (e) All of the preceding experience the same effective

nuclear charge in a multielectron atom.

(10) Which element has the higest electron affinity ?

(a) Ar (b) Br (c) Cl (d) S (e) Se

(11) Arrange in order of decreasing radii: K Mg Mg2+ Na

(a) Mg2+ > Mg > Na > K (b) K > Na > Mg2+ > Mg

(c ) K > Mg > Na > Mg2+(d) K > Na > Mg > Mg2+

(12) Given the electronegativityes, C = 2.5, N = 3.1, S = 2.4, which Lewis structure is best for

the thiocyanate ion?

(13) How many unshared pairs of valence electrons are in the Lewis structure for AsCl3?

(a) 1 (b) 3 (c) 10 (d) 13 (e) 26

(14) In a molecule of XeF4, the arrangement of electron pairs would be described as

(a) octahedral (b) square planar (c) square pyramidal (d) tetrahedral

(e) trigonal bipyramidal

(15) Which phase diagram corresponds to a substance that will sublime rather than melt as it is

heated at 1 atm?

(16) Which mixture is most likely to be an ideal solution?

(a) CH3CH2OH and CH3(CH2)3CH3

(b) CH3(CH2)3CH3 and CH3(CH2)4CH3

(c) CH3CH2OH and H2O

(d) NaOH and H2O

(e) CH3(CH2)3CH3 and H2O

(17) Arrange the bases ClCH2COO-, CH3COO- and FCH2COO- in order of increasing strength

(a) ClCH2COO- < FCH2COO- < CH3COO-

(b) CH3COO- < ClCH2COO- < FCH2COO-

(c) FCH2COO- < ClCH2COO- < CH3COO-

(d) CH3COO- < FCH2COO- < ClCH2COO-

(e) FCH2COO- < CH3COO- < ClCH2COO-

(18) Which can not act as a Lewis acid?

(a) O2-(b) Al(OH)3(c) CO2(d) Fe3+(e) BBr3

(19) If CaCl2 (aq) is electrolyzed using inert electrodes,

(a) H2(g) is produced at the cathode and Cl2(g) at the anode.

(b) Cl2(g) is produced at the cathode and H2(g) at the anode

(c) H2(g) is produced at the cathode and O2(g) at the anode.

(d) Ca(s) is produced at the cathode and Cl2(g) at the anode.

(e) Cl2(g) is produced at the cathode and Ca(s) at the anode

(20) Which lists only the species that have zero bond order?

Li2, Ne2, C2+, He2, F22-

(a) Ne2, He2, F22-(b) C2+, (c) Ne2, He2 (d) Li2, C2+ (e) Li2, He2

(21) Which lists only the molecules given below that are paramagnetic?

B2, C2, N2, O2, F2

(a) B2, N2(b) B2, O2(c) N2, O2(d) N2, F2(e) C2, O2, F2

(22) NF3 is best described by assuming what kind of hybridization at the central atom?