Which of the following tests is suitable to differentiate between aniline and benzylamine?

Question

Which of the following tests is suitable to differentiate between aniline and benzylamine? (A) Aniline gives dye test on diazotisation and reaction with β-naphthol while benzylamine gives alcohol (B) Benzylamine gives green dry with β-naphthol after diazotisation while aniline gives orange dye (C) Aniline gives carbylamine reaction while benzylamine does not (D) Benzylamine gives carbylamine reaction while aniline does not

Tardigrade Admin · Accepted Answer

Aniline forms stable diazonium salts when reacted with nitrous acid

H N O_{2}

, and no

N_{2}

gas is evolved.

N a N O_{2} + H Cl \to H N O_{2} + N a Cl

C_{6} H_{5} N H_{2} N a N O_{2} + H Cl C_{6} H_{5} N_{2} C l^{-} + N a Cl + 2 H_{2} O

Benzylamine on reaction with

H N O_{2}

yeilds Benzyl alcohol and Nitrogen gas.

C_{6} H_{5} C H_{2} N H_{2} H N O_{2} [C_{6} H_{5} C H_{2} N_{2}^{+} C l^{-}] H_{2} O C_{6} H_{5} C H_{2} O H + H Cl + N_{2} (g)

Q. Which of the following tests is suitable to differentiate between aniline and benzylamine?

Aniline gives dye test on diazotisation and reaction with $β$ -naphthol while benzylamine gives alcohol

Benzylamine gives green dry with $β$ -naphthol after diazotisation while aniline gives orange dye

Aniline gives carbylamine reaction while benzylamine does not

Benzylamine gives carbylamine reaction while aniline does not