英文有机化学试题

29. What is the relationship betweenα-D-(+)-glucopyranose and β-D-(+)-glucopyranose? A. identical B. cis-trans isomer C. anomer D. enantiomer 30. In the following compounds, which have the meso forms? A. 1,1-dibromobutane B. 1,2-dibromobutane C. 2,2-dibromobutane D. 2,3-dibromobutane The following are multiple choice (more than one choice are correct):
A. benzaldehyde A. －CHO A. HNO3 A. NH3
B. 1,3-cyclohexadiene B. －SO3H B. NaHSO3 B.(CH3)2NH
C. ClCH=CH2 D. ClCH2CH=CH2 D. －CN D. HCN
15．Which substituent on an aromatic ring is ortha-para director? C. －CH2CH3 C. H2N－NH2 C. C6H5NH2 16. Which of the following is electrophilic reagent？ 17. Which of the following shows the strongest basicity? D. CH3CONH2 18. Which of the following shows the weakest basicity?
O
Name_________________
2. 3. 6.
CH2=CHCH3
COOH
CH3 COOH OH OH COOH
5.
H—C—N(CH3)2
7.
O C CH3
(CH3CO)2O
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8. H H
9. 11.
10. H2NCH2CH2CH2CH2NH2 12. CH3COCl
O C OCH2CH3
13. Which one of the following exists π-π conjugate system? A. 1,3-dibutadiene B. ClCH=CHCH2CH3 C. +CH2CH=CH2 D.CH2=CH-CH2CH=CH2 14. Which one of the following exists p-π conjugate system?
a A. B. CH3 CH b CH2 C. CH3 C c CH D. CH3 d CH3
8. Which one of the following carbocations is most stable?
+ A. CH3 C CH3 CH=CH2
9. Which one of the following compounds yields a yellow oil when treated with nitrous acid?
22. What kind of hydrogen indicated with “
C. CH3CH2CH3 C. CH3CH2CH3
23. Which of the following shows the highest boiling point？ 24. Which of the following shows the highest activity toward nucleophilic acyl substitution? B. CH3CO-O-COCH3 C. CH3CO2CH3 25. Which of the following cannot react with silver nitrate ( AgNO3) to produce silver chloride at ordinary conditions? A. CH3C－Cl B. (CH3)3C－Cl O C. CH2=CHCHCH3 D. Cl
A. CH3CH2NH2 B. (CH3CH2)2NH C. (CH3CH2)3N D. NH2
+ B. CH3 CH CH3
+ C. CH3 CH2
+ D. CH3
10. Which one of the following compounds is easiest water-soluble?
A. CH2－CH－CH2 OH OH OH B. OH C. E. CH3CHCH2CH2OH CH3
4．Which one of the following does not give the iodoform test?
A. C6H5CHO B. CH3 C O
1
CH3
C. CH3CH2OH
D. CH3C-C6H5 O
5. Which one of the following structural formulas has no geometrical isomers?
Cl 26. Which of the folloing can be identified by UV-Vis spectroscopy?
A.
B.
C.
D.
27. Which one of the following shows the greated activity toward electrophilic substitution? A. Pyrrole B. benzene C. pyridine D.pyrimidine 28. What reagent or method can be used for distinguishing between butanol, 2-butanol and t-butanol? A. Tollens’ reagent B. Feihling reagent C. Lucas reagent D. Hingsberg test
3
31. Which ones can decolorise the aqueous solution of KMnO4.
A. CH3(CH2)3CH3 B. CH3CHO C. CH2OH D. CH3(CH2)2CH CH2
32. Which ones of the following are disaccharides. A. sucrose B. starch C. glucose D. maltose 33. Stereoisomerism includes A. cis-trans isomerism C. conformational isomerism A. furan B. sucrose B. pyridine B. starch
2. Which of the following is nucleophilic reagent？ A. Br2 A. —COOH B. NaHSO3 B. —NO2 C. H2SO4 C. —OCH3 D. —SO3H D. HCl
3. Which one of the following substituents activates an aromatic nucleus?
11. Which of the following compounds can react with Tollens’s reagent?
A. CH3 C O CH3 B. CHO C. CH3CH2OCH3 D. CH3CH2OH
12. Which one of the following carbohydrates is capable of being oxidized by bromine water? A. fructose B. sucrose C. glucose D. cellulose
2
A.
N H
B.
N
C.
N H
D.
NH2
19. Which of the following shows the strongest acidity?
COOH COOH NO2 OH C. D. H3C COOH
A.
B.
20. Which of the following shows the highest activity toward SN1 reaction? A.methylbromide B. ethylbromide C. 3-bromo-2-methylbutane D. 2-bromo-2-methylbutane 21. Which of the following shows the highest activity toward SN2 reaction? A.methylbromide C. 3-bromo-2-methylbutane toward free radical substitution. A. CH4 B. CH3CH3 A. CH3CH2OH B. CH3CH2Cl A. CH3COCl B. ethylbromide D. 2-bromo-2-methylbutane ” of the following is the most easily substituted D. (CH3)3CH D. CH3C≡CH D. CH3CONH2
A. CH3CH=CHCH3
B. C6H5CH=CHBr
C.
Cl Cl Cl
D. Cl
Cl
6. Which of the following is aromatic？ A.
O
B.
C.
N H
D.
7. Which of the following lettered carbon-carbon bonds is the longest？
Ⅱ.Write the structural formula for each of the following compounds.(8 points) 1. 3-ethyl-2-methylheptane 3. trans-2-pentene 5. m-propylphenol 7. benzaldehyde 2. 2,2-dimethyl-3-hexyne 4. cis-1,3-cyclohexanedicarboxylic acid 6. triethylamine 8. L-alanine
Ⅲ. Choose the best answers for each of the following questions. Your answer must be filled in the appointed card ( 选择题答案必须填写到答题卡上面才有效！40 points) Single choice (only one choice is correct) for 1~30: 1. Which one of the following is that all carbon atoms in the molecule are sp2 hybridized? A. HC≡CCH=CH2 B. (CH3)2C=CH2 C. CH2=CHCH=CHCl D.CH3CHClCH3
B. optical isomerism D. keto-enol tautomerism C. pyrrole C. D-glucose D. pyrimidine D. D-ribose
34. Which ones of the following are electron-rich aromatic heterocylcles？ 35. Which ones of the following are reducing sugar? 36. Which groups are called chromophore? A. C=O B. N=N C. O-H D. C—Br 37. Which groups are called auxochrome? A. –N=O B. -OR C. -NH2 D. –Br
Comprehensive Exercises for Organic Chemistry Time: 120min School number ______________ Ⅰ. Name each of the following compounds. (12 points) 1. CH3COCH2CH2CH3 3. CH3CH2OH