question_answer

Which of the following give dye test?

A)  Aniline                                

B)  Methylamine

C)  Diphenylamine               

D)   Ethylamine

Correct Answer: A

Solution :

Key Idea: Only\[{{1}^{o}}\]aromatic amines on reaction with\[HN{{O}_{2}}\]and phenol produce dye. Aliphatic amines liberate\[{{N}_{2}}\]and form alcohol on reaction with\[HN{{O}_{2}}\]. \[\because \][a] is \[{{1}^{o}}\] aromatic amine (aniline) \[\therefore \]It gives dye test.