Cyclohexylamine and aniline can be distinguis | vedclass

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Question

(D) Aniline is an aromatic primary amine,while cyclohexylamine is an aliphatic primary amine. The azo dye test is specific to aromatic primary amines.

Vedclass · Accepted Answer

Azo dye test

Vedclass · Answer

(D) Aniline is an aromatic primary amine,while cyclohexylamine is an aliphatic primary amine. The azo dye test is specific to aromatic primary amines. When aniline reacts with nitrous acid $(HNO_2)$ at $0-5 \ ^{\circ}C$ followed by coupling with $\beta$-naphthol,it forms a bright orange or red azo dye. Cyclohexylamine,being aliphatic,does not form a stable diazonium salt at low temperatures and consequently does not give the azo dye test. Therefore,the azo dye test is used to distinguish between them.

Cyclohexylamine and aniline can be distinguished by

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