Question

A positive carbylamines test is given by :
I. N,N-dimethylaniline
II. 2,4-dimethylaniline
III. N-methyl-o-methylaniline
IV. p-methylbenzylamine.

• A. (II) and (IV)
• B. (I) and (IV)
• C. (II) and (III)
• D. (I) and (II)

Answer 1

The correct option is A (II) and (IV)

Carbylamine or isocyanide test is given by only primary amines, whether they are aliphatic or aromatic.
I,II and III are aromatic compound IV is an aliphatic amine, compound II and IV are primary amines, Thus give positive carbylamine test, whereas compound III is a secondary amine and compound I is tertiary amine thus do not give positive carbylamine test.