When an aromatic primary amine like aniline reacts with at followed by coupling with an alkaline solution of -naphthol, the product is:

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Question

When an aromatic primary amine like aniline reacts with $NaNO_2/HCl$ at $0-5^\circ	ext{C}$ followed by coupling with an alkaline solution of $\beta$ -naphthol, the product is:

Prashant Kotian · Accepted Answer

Correct answer: D. This is the Azo-dye test. Aniline forms a diazonium salt which subsequently couples with -naphthol to form a brilliant orange-red azo dye.

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