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Q.

Azo-dyes are prepared from:

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a

Aniline

b

Salicylic acid

c

Benzaldehyde

d

Chlorobenzene

answer is A.

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Detailed Solution

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