Amines MCQs

Amines are derivatives of ammonia and are nitrogen-containing organic compounds. When a hydrogen atom in ammonia is replaced by an alkyl or aliphatic group, the result is an alkyl amine. When the hydrogen is replaced by an aryl or aromatic group, it is known as an arylamine. The nitrogen atom in amines contains a lone pair of electrons and is sp3 hybridized, giving the compound a pyramidal shape.

In this reaction acetamide is converted to methanamine

(a) Gabriel phthalimide synthesis
(b) Carbylamine reaction
(c) Stephen’s reaction
(d) Hoffmann bromamide reaction

In which of the following reactions does amide get converted to amine?

(a) Claisen
(b) Hoffmann
(c) Kekule
(d) Perkin

Which of the following is incorrect for primary amines?

(a) On reaction with nitrous acid alkylamines produce alcohol
(b) On reaction with nitrous acid arylamines produce phenol
(c) Alkylamines are more basic than ammonia
(d) Alkylamines are more basic than arylamines

Which of the following is true for the basicity of amines?

(a) Alkylamines are generally less basic than arylamines because N is sp hybridised
(b) Arylamines are generally more basic than alkylamines due to aryl group
(c) Arylamines are generally less basic than alkylamines due to delocalisation of lone pair of electrons in the benzene ring
(d) Alkylamines are generally less basic than arylamines because lone pair of electrons on N in the arylamines are not delocalised in the benzene ring

Which of the following is formed in the reaction of an aldehyde and primary amine?

(a) Ketone
(b) Aromatic acid
(c) Schiff’s base
(d) Carboxylic acid

Which of the following is formed when an alkyl primary amine reacts with nitrous acid?

(a) Alkyl nitrite
(b) Secondary amine
(c) Nitroalkane
(d) Alcohol

How many structural isomers are possible for C₃H₉N?

(a) 4
(b) 2
(c) 5
(d) 3

Which of the following compounds is formed on the electrolytic reduction of nitrobenzene in presence of strong acid?

(a) Azoxybenzene
(b) Aniline
(c) Azobenzene
(d) p-aminophenol

This on reduction with LiAlH₄ produces secondary amine

(a) Methyl cyanide
(b) Nitroethane
(c) Methyl isocyanide
(d) Acetamide

Aniline is less basic than

(a) Benzylamine
(b) Triphenylamine
(c) p-Nitroaniline
(d) Diphenylamine