Organic Chemistry - Amines
Q. Which of the following compounds can be prepared by the reduction of nitrobenzene? (2022)
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A.
Aniline
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B.
Benzylamine
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C.
Ethylamine
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D.
Methylamine
Solution
Nitrobenzene can be reduced to aniline using reducing agents like Sn/HCl.
Correct Answer: A — Aniline
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Q. Which of the following compounds can be used to distinguish between primary, secondary, and tertiary amines? (2023)
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A.
Bromine water
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B.
Nitrous acid
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C.
Sodium hydroxide
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D.
Hydrochloric acid
Solution
Nitrous acid can be used to distinguish between primary, secondary, and tertiary amines, as it reacts differently with each type.
Correct Answer: B — Nitrous acid
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Q. Which of the following is a tertiary amine? (2022)
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A.
CH3NH2
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B.
C2H5NH2
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C.
N(CH3)3
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D.
C6H5NH2
Solution
N(CH3)3 (trimethylamine) is a tertiary amine as it has three alkyl groups attached to the nitrogen.
Correct Answer: C — N(CH3)3
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Q. Which reaction is used to prepare primary amines from alkyl halides? (2022)
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A.
Reduction
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B.
Hydrolysis
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C.
Nucleophilic substitution
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D.
Dehydrohalogenation
Solution
Primary amines can be prepared from alkyl halides through nucleophilic substitution reactions with ammonia.
Correct Answer: C — Nucleophilic substitution
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Q. Which reagent is used to convert an amine to an amide? (2023)
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A.
Acid chloride
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B.
Alcohol
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C.
Aldehyde
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D.
Ketone
Solution
An acid chloride is used to convert an amine to an amide through acylation.
Correct Answer: A — Acid chloride
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