When an aromatic primary amine like aniline reacts with at followed by coupling with an alkaline sol — Practical Organic Chemistry and Purification Chemistry Question
Question
When an aromatic primary amine like aniline reacts with $NaNO_2/HCl$ at $0-5^\circ\text{C}$ followed by coupling with an alkaline solution of $\beta$ -naphthol, the product is:
Answer: B
💡 Solution & Explanation
This is the Azo-dye test. Aniline forms a diazonium salt which subsequently couples with $\beta$ -naphthol to form a brilliant orange-red azo dye.
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