3-8 Chemistry MCQ

30. The IUPAC name of CH3OCH2CH2CH3 is

(a) propoxymethane (b) methoxypropane
(c) methylpropyl ether (d) propylmethyl ether

31. The IUPAC name of Cl  CH2  CH  CH2Cl is


Cl
(a) 1,2,3-trichloropropane
(b) 1,2-dichloropropyl chloride
(c) 1,1-dichloroisopropyl chloride
(d) propane trichloride

32. The IUPAC name of CH3CHO is

(a) acetaldehyde (b) formyl methane
(c) ethanal (d) methylaldehyde

33. The IUPAC name for CH3CH2COOH is

(a) ethane carboxylic acid (b) ethanoic acid
(c) ethylformic acid (d) propanoic acid

34. The IUPAC name of CH3CH2CHCH2CH2CH2CH3 is


CH3

(a) 5-methylheptane (b) 3-methylheptane

(c) 1-methyl-1-ethylpentane (d) 2-ethylhexane

35. The IUPAC name of CH3COCH2CH2CH3 is

(a) 2-pentanone (b) 4-pentanone
(c) methylpropylketone (d) ethylacetone

36. The IUPAC name of CCl3CHO is

(a) 1,1,1-trichloroethanal (b) 2,2,2-trichloroethanal
(c) trichloroacetaldehyde (d) chloral

37. The IUPAC name of CH3  CH CH=CH  CH3 is


CH3

(a) 2-methylpentane (b) 4-methylpentene-2

(c) 2-hexene (d) 2,4-dimethylbutene

38. The IUPAC name of CH2=CH CHCH32 is

(a) 1-isopropylethylene (b) 1,1-dimethyl-2-propene
(c) 3-methyl-1-butene (d) 2-vinylpropane
 Classification, Nomenclature and Hybridization 3-9

39. The IUPAC name of CH3CH2C=CH2 is


CH3

(a) 3-methylbutene-1 (b) 2-methylbutene-1

(c) vinylmethylethane (d) propylethene-1

40. The IUPAC name of CH3CH2CH=CCH3 is


CH2CH3

(a) 2-ethyl-2-pentene (b) 4-ethyl-2-pentene

(c) 3-methyl-3-hexene (d) 3-methyl-2-pentene
41. The IUPAC name of CH33C  CH=CH2 is
(a) 1,1-dimethyl-3-butene (b) 3,3-dimethyl-1-butene
(c) 3,3,3-trimethyl-1-propene (d) 1,1,1-trimethyl-2-propene
CH3

42. The IUPAC name of the compound H2C=CC#C CH3 is
(a) 2-methylpent-1-ene-3-yne (b) 4-methylpent-4-ene-2-yne
(c) 2-methylpent-2-ene-3-yne (d) 2-methylpent-3-yne-2-ene

43. The IUPAC name of C2H5 CCHCH3 is

  

H2C CH3

(a) 3-methyl-2-ethylbutene-1 (b) 3-ethyl-3-methylbutene-1

(c) 2-ethyl-3-methylbutene-1 (d) ethylisopropylethene

44. The IUPAC name of CH3  CH  CHO is


CH2CH3
(a) 2-methylbutanal (b) butan-2-aldehyde
(c) 2-ethylpropanal (d) 3-methylisobutyraldehyde

45. The IUPAC name of CH3  CH  CH2  CH2OH is


CH3
(a) pentanol (b) 1-pentanol
(c) 2-methyl-4-butanol (d) 3-methyl-1-butanol

46. The IUPAC name of CH3CH2CHCH2OH is


CH2CH3

(a) 2-methyl-1-pentanol (b) 2-ethylbutanol-1

(c) 2-ethylpentanol-1 (d) 3-ethylbutanol-1
3-10 Chemistry MCQ

CH3

47. The IUPAC name for CH3CHOHCH2COH is

CH3
(a) 2-methyl-2,4-pentanediol
(b) 1,1-dimethyl-1,3-butanediol
(c) 1,3,3-trimethyl-1,3-propanediol
(d) 4-methyl-2,4-pentanediol

O
 

48. The IUPAC name for CH3CH CH=CHCH2 COH is


CH3
(a) 5-carboxy-2-methylpentene
(b) 4-isopropyl-3-butenoic acid
(c) 5-methyl-4-hexenoic acid
(d) none of these
49. The structure of 4-methylpentene-2 is
(a) CH32CHCH=CHCH3
(b) CH32CHCH2CH=CH2
(c) CH32CHCH2CH=CHCH3
(d) CH32C=CHCH2CH3
50. 2-methyl-2-butene is represented as
CH3

(a) CH3  C=CHCH3 (b) CH3CH2  C=CH2

CH3

(c) CH3CHCH=CH2 (d) CH3  CCH2CH3

 
CH3 CH2

CH3

51. The IUPAC name of CH3  C  Br is

CH3
(a) tertiary butylbromide
(b) isobutylbromide
(c) 2-bromo-2-methylpropane
(d) 2-methyl-2-propylbromide
 Classification, Nomenclature and Hybridization 3-11

52. The IUPAC name of CH3CH=CHCH2Br is

(a) 1-bromo-3-butene (b) 1-bromo-2-butene
(c) 2-butene-1-bromide (d) 4-bromo-2-butene
53. The IUPAC name of CH33C  OH is
(a) tert. butylalcohol (b) 2-methyl-2-propanol
(c) 2-methyl-1-butanol (d) 2-propanol
54. The IUPAC name of CH3COCH2CH2CH3 is
(a) methyl-n-propylketone (b) 2-pentanone
(c) 3-pentanone (d) n-propylmethylketone

CH3CH3
 
55. The IUPAC name of CH3C C CH2CH3 is
 
CH3CH2CH2CH2CH3
(a) 3-ethyl-2,2,3-trimethylheptane
(b) 2,2,3-trimethyl-3-n-butylpentane
(c) 3-methyl-3-isopropylheptane
(d) 2,2-dimethyl-3-ethyl-3-n-butylbutane

CH3

56. The IUPAC name of CH3  CHCH2  CH  CH2CH3 is

CH2CH3
(a) 2-ethyl-4-methylhexane (b) 3,5-dimethylheptane
(c) 5-ethyl-3-methylhexane (d) 2,4-diethylpentane

CH3 CH3
 
57. The IUPAC name of CH3CHCHC  CH3 is
 
OH OH

(a) 1,1,2-trimethyl-1,3-butanediol
(b) 1,2-dimethyl-2,4-pentanediol
(c) 2,3-dimethyl-2,4-pentanediol
(d) 1,2,3,4-tetramethyl-1,3-propanediol

CH3

58. The IUPAC name of CH3CCCHCH3 is
(a) 4-methyl-2-pentyne (b) methylisopropylacetylene
(c) 4,4-dimethyl-2-butyne (d) 2-methyl-4-pentyne
3-12 Chemistry MCQ

59. The structure of 4-methyl-2-penten-1-ol is

(a) CH32CHCH2=CHCH2OH
(b) CH3CHOHCH=CCH32
(c) CH32=CHCH2CH2OH
(d) CH3CH2CH=CHCH 2OH

60. Which of the following compounds are named correctly?

(a) CH32CHCH2CH2CH2CHO (5-methyl-1-hexanal)
(b) CH32CHCH2CC COOH (5-methyl-2-hexynoic acid)
(c) CH3CH2CH2CH2CHCH3COOH (2-methylhexanoic acid)
(d) CH3CH2CH=CHCOCH3 (3-hexen-5-one)

61. The IUPAC name of CH33C CH2CH=CH2 is

(a) 2,2-dimethylpent-4-ene (b) 2,2-dimethylhex-4-ene
(c) 4,4-dimethylpent-1-ene (d) hex-1-ene
62. In which of the following are all carbon atoms sp-hybridized?
(a) CH3CH=CHCH3 (b) CH3CCCH3
(c) HCCCCH (d) CH3CH2CCH

63. The hybridization of carbon atoms in the CC single bond of

HCCCH=CH2 is
(a) sp3–sp3 (b) sp2–sp3
(c) sp–sp2 (d) sp3–sp

64. Which of the following compounds have only one type of hybrid carbon?
(a) CH2=CHCH=CH2 (b) HCCCCH
(c) CH3CH2CH2CH3 (d) CH3CCCH3

P2O5
65. In the reaction CH3CONH2  CH3CN, the hybridization state of

the carbon atom changes from
(a) sp2 to sp (b) sp3 to sp
(c) sp3 to sp2 (d) sp2 to sp3

66. Which of the following have zero dipole moment?

(a) H2 (b) HF
(c) CH4 (d) CHCl3
 Classification, Nomenclature and Hybridization 3-21

Answers
1. c 2. a 3. a 4. c 5. c
6. d 7. c 8. d 9. d 10. c
11. b 12. a 13. b 14. c 15. a
16. a 17. d 18. d 19. a 20. c
21. a, b, c 22. c 23. c 24. c, d 25. a, d
26. a 27. c 28. c 29. c 30. b
31. a 32. c 33. d 34. b 35. a
36. b 37. b 38. c 39. b 40. c
41. b 42. a 43. c 44. a 45. d
46. b 47. a 48. d 49. a 50. a
51. c 52. b 53. b 54. b 55. a
56. b 57. c 58. a 59. a 60. a, b, c
61. c 62. c 63. c 64. a, b, c 65. a
66. a, c 67. a 68. b 69. a, b, c, d 70. a
71. b 72. c 73. b 74. d 75. c
76. a 77. b 78. d 79. a 80. b
81. a 82. b 83. c 84. a 85. c
86. a 87. b 88. a 89. c 90. d
91. a 92. a 93. c 94. a 95. a
96. a 97. b 98. a 99. c 100. c
101. a 102. a 103. b 104. a 105. a
106. d 107. c 108. c 109. d 110. c
111. b

Hints to More Difficult Problems

2 & 6 Compounds of this type are named systematically by attaching the prefix
‘bicyclo’ to the name of the open-chain hydrocarbon with the same total
number of carbon atoms in the ring. The size of the two rings is specified
by the number of carbon atoms in each of the three linkages which
connect the two atoms at the ring junctions.
15. According to IUPAC nomenclature, the name is assigned by taking the
longest continuous chain as it passes through the double bond.



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