22 Answers to Organic Class Sheet 1, 2 & 3

7/30/2019 22 Answers to Organic Class Sheet 1, 2 & 3

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ANSWERS TO ORGANIC CLASS SHEETS 1, 2 & 3

EDUDIGM

ANSWERS TO ORGANIC CLASS SHEET 3

1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20

c c d c c c c c c a a c d d c a b d b a

21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40

c c c c a d a c c d c c a c c c a a c c

41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60

c c d b a ac c a b c d c c a d c a b b a

61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80

d a d a c a b a d b b a d c b b b ac b d

81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100

a a c b a a c a d d a a c a a d a cd ab ad

101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120

c a b d b d d b c d c a a b b c d acd d a

121 122 123 124 125 126 127 128 129 130 131 132 133 134 135 136 137 138 139 140

a a a b b a b d d a b a c b a b c d a c

141 142 143 144 145 146 147 148 149 150 151 152 153 154 155 156 157 158 159 160

d c a c c c b c e a c e d c b d d c b d

161 162 163 164 165 166 167 168 169 170 171 172 173 174 175 176 177 178 179 180

d d c a b d abd c b d ac cd abcd ac ac c a a b a

181 182 183 184 185 186 187 188 189 190 191 192 193 194 195 196 197 198 199 200

d c a c c c c d ab c a b c c a a a b a d

201 202 203 204 205 206 207 208 209 210 211 212 213 214 215 216 217 218 219

c d c c c b b bc ac ab ac a c a b b c a

ANSWERS TO CLASS SHEET 2

1 2 3 4 5 6 7 8 9 10 11 12 13 14

c c d a d d d c d b d b b b a

16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34

d b c d a b b a a a b b e c b d d ae cd c

36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 b b c d c c acd b a c a bc b c b b abc a b b

56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74

ab cd b d a c a ab d c b b c b b c b a b

76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94

a a c d a d b c b d a d a bc a c a d a

96 97 98 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 1


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EDUDIGM

c c b d b d d c bc c d c a b a ab c ac b

116 117 118 119 120 121 122 123 124 125 126 127 128 129 130 131 132 133 134 1

bc

d

b ac a d bcd a a b d a abc

d

a a a abc

d

c a a d

136 137 138 139 140 141 142 143 144 145 146 147 148 149 150 151 152 153 154 1

b a b b a d b d d b d b d c b a a a a a

156 157 158 159 160 161 162 163 164 165 166 167 168 169 170 171 172 173 174 1

d c c b b a a c c b c b a a d a a d b a

176 177 178 179 180 181 182 183 184 185 186 187 188 189 190 191 192 193 194 1

b b d a d a b b a a b b b c d a ac b d

196

Choos e the correct option/s. one or more options may be correct

1. Which of the following statements is true about a homologous series?

(a) Adjacent numbers of a group differ by a mass of 14

(b) Adjacent numbers of a group differ by one group

(c) Members of a homologous series can be prepared by the s ame general methods

(d) Members of a homologous series have the same physical and chemical properties

Solution: a, b, c

2. The large number of organic compounds is due to

(a) The valency of carbon

(b) The smal l size of carbon

(c) A s pecial property of carbon, known as catenation

(d) None of the above

Solution: c

3. How many isomers are possible for the alkyl group

(a) two (b) three (c) four (d) five

Solution: c

4. Which of the following compounds will have only primary and tertiary carbon?

(a) penta ne (b) 2-methylbutane


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EDUDIGM

(c) 2, 3-dime thylbutane (d) 2-bromo-2-methylpropane

Solution: c, d

5. Which of the following compounds will have only primary and secondary carbon?

(a) propa ne (b) 2,2,3-trimethylpentane

(c) 2-methylpropane (d) n-propylbromide

Solution: a, d

6. Which of the following compounds has an isopropyl group?

(a) 2-methylpentane

(b) 2,2-dimethylpentane

(c) 2,2,3,3-tetramethylpentane

(d) 2,2,3 -trimethylpenatane

Solution: a

7. The general molecular formula of an alkyne is

(a) (b)

(c) (d)

Solution: c

8. The IUPAC name of

Is

(a) 1,2-dichloropropane (b) 3,3-dichloropropane

(c) 1,1-dichloropropane (d) dichloropropane

Solution: c

9. The IUPAC name of is

(a) 1,1,2,2 -tetramethylethane

(b) 1,2-dii sopropylethane

(c) 2,3-dimethylbutane

(d) 2,3,3-trimethylbutane

Solution: c


(a) propoxymethane (b) methoxypropane


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EDUDIGM


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

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

Solution: b


(a) 1-isopropylethylene (b) 1,1-dimethyl-2-propane

(c) 3-methyl -1-butene (d) 2-vinylpropane

Solution: c


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

(c) vinylmethylethane (d) propylethene-1

Solution: b


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

(c) 3-methyl -3-hexene (d) 3-methyl -2-pentene

Solution: c


(a) 1,1-dimethyl-3-butene

(b) 3,3 ,-dimethyl-1-butene

(c) 3,3,3 -trimethyl-1-propene

(d) 1,1,1-trimethyl-2propene

Solution: b

22. The IUPAC name of the compound

(a) 2-methylpent-1-ene-3-yne

(b) 4-methylpent-4-ene-2-yne

(c) 2-methylpent-2-ene-3-yne


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EDUDIGM

(d) 2-methylpent-3-yne-2-ene

Solution: a


(a) 3-methyl -2-ethylbutene-1

(b) 3-ethyl -3-methylnutene-1

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

(d) ethyl isopropylethene

Solution: c


(a) 2-methylbutanal (b) butan-2-aldehyde

(c) 2-ethylpropanal (d) 3-methyl isobutyradelhyde

Solution: a


(a) pentanol (b) 1-pentanol

(c) 2-methyl -4-butanol (d) 3-methyl -1-butanol

Solution: d


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

(c) 2-ethylpentanol -1 (d) 3-ethylbutanol -1

Solution: b

27. The IUPAC name for

(a) 2-methyl -2,4-pentanediol

(b) 1,1-dimethyl-1,3-butanediol


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EDUDIGM

(c) 1,3,3-trimethyl-1,3-propanedoil

(d) 4-methyl-2,4-pentadiol

Solution: a

28. The IUPAC name for

(a) 5-carboxy-2-methylpentene

(b) 4-isopropyl-3-butanoic acid

(c) 5-methyl-4-hexanoic acid

(d) none of these

Solution: d

29. The s tructure of 4-methylpentete-2 i s

(a)

(b)

(c)

(d)

Solution: a

30. 2-methyl-2-butene is represented as

Solution: a


(a) tert iary butylbromide

(b) isobutylbromide

(c) 2-bromo-2-methylpropane


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EDUDIGM

(d) 2-methyl-2-propylbromide

Solution: c


(a) 1-bromo-3-butene (b) 1-bromo-2-butene

(c) 2-butene-1-bromide (d) 4-bromo-2-butene

Solution: b


(a) tert.butylalcohol (b) 2-methyl -2-propanol

(c) 2-methyl -1-butanol (d) 2-propa nol

Solution: b


(a) methyl -n-propylketone (b) 2-penta none

(c) 3-penta none (b) n-propylmethylketone

Solution: b


(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

Solution: a


(a) 2-ethyl -4-methylhexane

(b) 3,5-dimethylheptane

(c) 5-ethyl-3-methylhexane

(d) 2,4-die thylpentane


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EDUDIGM

Solution: b


(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

Solution: c


(a) 4-methyl -2-pentyne (b) methyl isopropylacetylene

(c) 4,4-dimethyl-2-butyne (d) 2-methyl -4-pentyne

Solution: a

39. The s tructure of 4-methyl-2-penten-1-ol is

(a) (b)

(c) (d)

Solution: a

40. Which of the following compounds are named correctly?

(a) (5-methyl-1-hexanal)

(b)

(5-methyl-2-hexanoic acid)

(c)

(2-methylhexanoic acid)

(d) (3-hexen-5-one)

Solution: a, b, c


(a) 2,2-dimethylpent-4-ene (b) 2,2-dimethylhex-4-ene

(c) 4,4-dimethylpent-1-ene (d) hex-1-ene

Solution: c

42. In which of the following are all carbon atoms -hybridized?

(a) (b)


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EDUDIGM

(c) (d)

Solution: c

43. The hybridization of carbon atoms in the C-C single bond of is

(a) (b)

(c) (d)

Solution: c

44. Which of the following compound have only one type of hybrid carbon?

(a) (b)

(c) (d)

Solution: a, b, c

45. In the reaction , the hybridization state of the carbon atom changes from

(a) (b)

(c) (d)

Solution: a

46. Which of the following have zero dipole moment?

(a) (b) (c) (d)

Solution: a, c

47. Arrange the following resonating structures of vinyl c hloride in order of decreasing stability

(a) (b)

(c) (d)

Solution: a

48. Arrange the following resonating structures of formic acid in order of decreasing stability

(a) (b)

(c) (d)

Solution: b

49. Which of the following molecules show resonance?


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EDUDIGM

(a) CO (b) (c) NO (d)

Solution: a, b, c, d

50. Arrange the following free radicals in order of stability

(a) (b)

(c) (d)

Solution: a

51. Arrange the following free radicals in order of stability

Benzyl, a llyl, methyl, vinyl

I II III IV

(a) (b)

(c) (d)

Solution: b

52. Arrange the following carbonium ions in order of decreasing stability

(a) (b)

(c) (d)

Solution: c

53. Which of the following compounds will produce the most stable carbonium ion?

Solution: b


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EDUDIGM

54. The bond that undergoes heterolytic cleavage most readily is

(a) C-C (b) C-O (c) C-H (d) O-H

Solution: d

55. Hydrogen bonding is maximum in

(a) trie thylamine (b) ethyl chloride

(c) ethyl al cohol (d) diethyl ether

Solution: c

56. Which of the following compounds will exhibit cis -trans isomerism?

(a) 2-butene (b) 2-butyne

(c) 1-butene (d) 2-butanol

Solution: a

57. Which of the fol lowing compounds will exhibit geometrical isomerism?

Solution: b

58. Which of the following compounds exhibit optical isomerism?

(a) (b)

(c) (d)

Solution: d

59.

The IUPAC name of this compound is

(a) 2,2,6-trimethyl-4-(1-methylpropyl) nonane

(b) 4,8,8-trimethyl-6-(1-methylpropyl) nonane


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EDUDIGM

(c) 3,6-dime thyl-4-(methylene tertiary butyl) nonane

(d) 6,6-dimethyl-2-propyl-4-(1-methylpropyl) heptane

Solution: a

60.


(a) 3-ethyl -4-chloro-1,4-pentadiene

(b) 2-chloro-3-ethyl-1,4-pentadiene

(c) 4-chloroethenyl-1-pentene

(d) 3-ethenyl-4-chloro-4-pentene

Solution: b

61.


(a) 2-ethoxy-4-methoxypentan-3-one

(b) 2-methoxy-4-ethoxy-pentan-3-one

(c) 2-ethoxy-4-methoxy-pentan-3-one

(d) none of these

Solution: a


(a) 2,3-dimethylpentanal (b) 3,4-dimethylpentanal

(c) 3,4,4-trimethylbutanal (d) 3-isopropylbutanal

Solution: b


(a) 2-methyl -2,4-dihydroxypropane


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EDUDIGM

(b) 2,2-dimethyl-4-hydroxybutanol

(c) 2-methyl -2,4-pentanediol

(d) 2-hydroxy-4,4-dimethylbutanol -4

Solution: c


(a) 2-bromomethyl-3-oxohexanamide

(b) 1 -bromo-2-amido-3-oxohexane

(c) 1-bromo-2-amido-n-propylketone

(d) 3-bromo-2-propnylpropanamide

Solution: a


(a) 2-ethyl-ethylacetate

(b) ethyl -3-methylbutanoate

(c) ethyl -2-methylbutanoate

(d) 2-methylbutanoic acid ethlyester

Solution: c


(a) N-methyl-N-ethylamine

(b) diethylmethylamine

(c) N-ethyl-N-methylaminoethane

(d) methyldiethylamine

Solution: a

67.


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EDUDIGM


(a) 2-is opropylbutanal

(b) 2-ethyl-3-methylbutanal

(c) 3-ethyl-2-methylbutanal

(d)2-methylpentane-3-aldehyde

Solution: b


(a) 1,1,1-trichloro-3,3-diphenylpropane

(b) 1,1-diphenyl-3,3,3-trichloropropane

(c) both (a) and (b)

(d) none of these

Solution: a


(a) cinammic acid

(b) 1 -phenyl-2-carboxyethene

(c) 3-phenylprop-2-enoic acid

(d) dihydroxy-3-phenylpropionoic acid

Solution: c


(a) 1-propyn-ethene (b) propeneacetylene

(c) pent-4-yne-1-ene (d) pent-1-en-4-yne

Solution: d


(a) 1-cyclohexyl-3-methyl-1-pentene

(b) 3-methyl-5-cyclohexyl-pent-1-ene

(c) 1-cyclohexal-3-ethyl-but-1-ene

(d) 1-cyclohexyl-3,4-dimethyl-but-1-ene

Solution: a


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EDUDIGM

72.


(a) 3,3-dimethyl-2-pentanol

(b) 3-methyl -3-ethyl-2-butanol

(c) 3,3-dimethyl-3-ethyl-isopropanol

(d) 3,3-dimethyl-3-ethyl-2hydroxypropane

Solution: a

73.


(a) 2-fluoro-4-chloro-2,4-diethylpentane

(b) 3-fluoro-5-chloro-3-methyl-5-ethylhexane

(c) 3-chloro-5-fluoro-3,5-dimethylheptane

(d) 3,5-dimethyl-5-fluoro-3-chloroheptane

Solution: c

74. The effect of decreases in the order

(a) (b)

(c) (d)

Solution: a

75. The +I effect of decreases in the order

(a) (b)

(c) (d)

Solution: a

76. The inductive effect of the a lkyl groups on a saturated carbon chain follows the order

(a)


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EDUDIGM

(b)

(c)

(d)

Solution: a

77. Give the IUPAC name of

(a) 4-is opropyl-5-ter. butyloctane

(b) 4-ter. butyl -5-isopropyloctane

(c) 2 -methyl-3-propyl-4-ter, buytlheptane

(d) 2,2-dimethyl-3-propyl-4-isopropylheptane

Solution: b


(a) 4-ethyl -3-methyl-trans-3-heptane

(b) 4-ethyl-5-methyl-trans-4-heptane

(c) 3-ethyl-4-propyl-3-hexene

(d) 3 -propyl-4-ethyl-3-pentene

Solution: a


(a) 5-chloro-3-penten-3-carbinol (b) 1-chloro-3-penten-3-carbinol

(c) 4-chloro-2-ethyl-2-buten-1-ol (d) 1-chloro-3-ethyl-2-buten-4-ol

Solution: c


(a) metha crolein (b) metha cryaldehyde

(c) 2-methylpropenal (d) propenaldehyde


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EDUDIGM

Solution: c


(a) phenylethanone (b) methylphenylketone

(c) ace tophenone (d) phenylemethylketone

Solution:a


(a) 5-ethy-1, 3, 5-heptatriyne (b) 3-ethyl-2, 4, 5-heptatriyne

(c) 5-ethenyl-1, 3-heptatriyne (d) 3-ethenyl-4, 6-heptatriyne

Solution: a


(a) ela idic acid (b) trans-octadec-9-enoic acid

(c) dihydrosteric acid (d) olei c ac id

Solution: b


(a) cis -cis -9, 12-octadecadienoic acid (b) cis -trans-9, 2- octadecadienoic acid

(c) 9,10 - octadecadienoic acid (d) 9,14 - octadecadienoic acid

Solution: a

85. The IUAC name of

(a) 6-(1-methylbutyl)-8-(2-methylbutyl) tetradecane


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EDUDIGM

(b) 6-(2-methylbutyl)-8-(1-methylbutyl) tetradecane

(c) 4-methyl -5- -pentyl-7-(2-methylbutyl) tridecane

(d) 3-methyl -5- -hexyl-7-(1-methylbutyl) didecane

Solution: a


(a) 4,4-di(formylmethyl) butanal

(b) 2-(formylmethal) butane-1, 4-dicarbandehyde

(c) hexane-3-acetal-1, 6-dial

(d) 3-(formylmethyl) hexane-1, 6-dial

Solution: d


(a) 2-chlorocarbonyl ethylbenzoate (b) 2-carboxyethyl benzoayl chloride

(c) ethyl-2-(chlorocarbonyl) benzoate (d) ethyl-1-(chlorocarbonyl) benzoate

Solution: c


(a) 2-chloroc arbonyl ethylbenzoate (b) 2-carbonxyethyl benzoyl chloride

(c) ethyl-2-(chlorocarbonyl) benzoate(d) ethyl-1-(chlorocarbonyl) benzoate

Solution: c


(a) phenyl cyanide (b) phenyl acetonitrile

(c) benzene cyanide (D) benzoni trile


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EDUDIGM

Solution: d


(a) phenylethylamine (b) 2-phenyl aminoethane

(c) 2-phenylethanamine (d) benzyl methylamine

Solution: c


(a) 2-(N-methylamino)-4-methypentane (b) N,4-dimethypentan-2-amine

(c) 2-(N-methylamino)-3-isopropylpropane

(d) 2-(N-methylamino)-1,4,4-trimethylbutane

Solution: b

22 Answers to Organic Class Sheet 1, 2 & 3

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Transcript of 22 Answers to Organic Class Sheet 1, 2 & 3