Organic Compounds: Acetanilide, p-nitro Acetanilide, Aniline Yellow, Iodoform NEET Questions

Organic Chemistry - Principles of Practical Chemistry

Organic Compounds: Acetanilide, p-nitro Acetanilide, Aniline Yellow, Iodoform MCQ Questions


13.
On nitration of acetanilide, the major product is:
A.
o-Nitroaniline
B.
p-Nitroacetanilide
C.
m-Nitroacetanilide
D.
2,4,6-Trinitroacetanilide
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ANSWER :
B. p-Nitroacetanilide
14.
In the preparation of acetanilide, aniline must be free from:
A.
Hydrochloric acid
B.
Coloured oxidation products
C.
Water only
D.
Ammonia
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ANSWER :
B. Coloured oxidation products
15.
Why is the reaction mixture (aniline + acetic anhydride) added to ice-cold water after heating?
A.
To convert acetanilide back to aniline
B.
To increase rate of reaction
C.
To precipitate acetanilide as solid
D.
To dissolve acetanilide completely
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ANSWER :
C. To precipitate acetanilide as solid
16.
Acetanilide gives a positive test with:
A.
Tollen's test
B.
Carbylamine test
C.
Ferric chloride test
D.
None of carbylamine, ferric chloride, or Tollen's tests
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ANSWER :
D. None of carbylamine, ferric chloride, or Tollen's tests
17.
Which of the following is the correct mechanism for formation of acetanilide?
A.
Nucleophilic acyl substitution
B.
Markovnikov addition
C.
Free radical halogenation
D.
Electrophilic aromatic substitution
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ANSWER :
A. Nucleophilic acyl substitution
18.
On reaction with bromine water, acetanilide gives mainly:
A.
2,4,6-Tribromoacetanilide
B.
Bromobenzene
C.
p-Bromoacetanilide
D.
m-Bromoacetanilide
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ANSWER :
C. p-Bromoacetanilide