Azo-dyes are prepared from:

Question

Azo-dyes are prepared from: (A) Aniline (B) Salicylic acid (C) Benzaldehyde (D) Chlorobenzene

Tardigrade Admin · Accepted Answer

When aniline is treated with HNO2 at 0-5°C then diazonium salt is formed and by the coupling of diazonium salt and phenol azo dyes are prepared. <img class="img-fluid question-image" alt="image" src="https://cdn.tardigrade.in/img/question/chemistry/7929ddb8f0b1270951278b5801009087-.png" />

Q. Azo-dyes are prepared from:

Aniline

Salicylic acid

Benzaldehyde

Chlorobenzene

When aniline is treated with $H N O_{2}$ at $0 - 5^{\circ} C$ then diazonium salt is formed and by the coupling of diazonium salt and phenol azo dyes are prepared.

Q. Azo-dyes are prepared from:

Aniline

Salicylic acid

Benzaldehyde

Chlorobenzene

When aniline is treated with HNO2​ at 0−5∘C then diazonium salt is formed and by the coupling of diazonium salt and phenol azo dyes are prepared.

When aniline is treated with $H N O_{2}$ at $0 - 5^{\circ} C$ then diazonium salt is formed and by the coupling of diazonium salt and phenol azo dyes are prepared.