Which of the following compounds gives a brig | vedclass

Name: Exam Paper Generator | JEE NEET Paper Generator | Vedclass
Brand: Vedclass
Rating: 5 (35 reviews)

Question

(C) The reaction described is the dye test,which involves the formation of a diazonium salt followed by an azo coupling reaction with $\beta$-naphthol

Vedclass · Accepted Answer

$p-CH_3C_6H_4NH_2$

Vedclass · Answer

(C) The reaction described is the dye test,which involves the formation of a diazonium salt followed by an azo coupling reaction with $\beta$-naphthol to form an azo dye.Primary aromatic amines $(ArNH_2)$ react with $NaNO_2/HCl$ at $0-5^{\circ}C$ to form stable diazonium salts,which then undergo coupling with $\beta$-naphthol to produce a bright orange or red dye.Option $A$ is a tertiary amine,which forms a nitroso compound,not a diazonium salt.Option $B$ is a secondary amine,which forms an $N$-nitrosoamine.Option $C$ is $p$-toluidine,a primary aromatic amine. It forms a diazonium salt with $NaNO_2/HCl$,which then couples with $\beta$-naphthol to form a bright dye.Option $D$ is benzylamine,an aliphatic primary amine. Its diazonium salt is highly unstable and decomposes to form alcohol and nitrogen gas,thus it does not form a stable dye.

Which of the following compounds gives a bright dye upon reaction with $NaNO_2$ in dilute $HCl$ followed by coupling with an alkaline solution of $\beta$-naphthol?

Similar Questions

$p$-chloroaniline and anilinium hydrogen chloride can be distinguished by

Primary amines can be distinguished from secondary and tertiary amines by reacting with:

Ammonia reacts with which of the following reagents to give a brown precipitate?

The amine or salt of amine which gives a positive test with a mixture of chloroform and alcoholic $KOH$ solution is:

Vedclass Test Series

Exam Paper Generator

Online Exam Module