The diazonium salt of which of the following | vedclass

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Question

(C) The formation of a coloured dye (azo dye) occurs through the coupling reaction of a diazonium salt with an aromatic compound like $\beta$-Naphthol

Vedclass · Accepted Answer

Aniline $(C_6H_5NH_2)$

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(C) The formation of a coloured dye (azo dye) occurs through the coupling reaction of a diazonium salt with an aromatic compound like $\beta$-Naphthol in an alkaline medium $(NaOH)$.Primary aromatic amines,such as aniline $(C_6H_5NH_2)$,react with $NaNO_2$ and $HCl$ at $0-5 \ ^\circ C$ to form stable benzenediazonium chloride.This diazonium salt then undergoes an electrophilic substitution (coupling) reaction with $\beta$-Naphthol to produce an orange-red azo dye.Benzylamine is an aliphatic amine and does not form a stable diazonium salt under these conditions.$N,N$-Dimethylaniline and $N$-Methylaniline are secondary and tertiary amines,respectively,and do not form the same type of stable diazonium salt required for this specific coupling reaction to produce the characteristic dye.

The diazonium salt of which of the following compounds will form a coloured dye on reaction with $\beta$-Naphthol in $NaOH$?

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