Question

In order to distinguish between C₂H₅NHz and C₆H₅NHz, which of the following reagents is useful?

Options

• Hinsberg test

• β-Naphthol

• CHCl₃/KOH

• NaOH

Answer 1

β-Naphthol

Explanation:

Hinsberg test is used distinguish between primary, secondary and tertiary amines. Both the given compound are primary amines. When Aniline (C₆H₅NH₂) is treated with HNO₂ it undergoes diazotization and forms diazonium salt. It give azodye when treated with β - Naphthol.

When ethylamine reacts with HNO₂, it does not undergo diazotiscetion but gives alcohol, which does not yield azodye on treating with ~- naphthol.