MCQ
Azo-dyes are prepared from :
- ✓Aniline
- BSalicylic acid
- CBenzaldehyde
- DChlorobenzene
✓
Answer
Correct option: A.
Aniline
a
(a) When aniline is treated with $HN{O_2}$ at $0-5\,^oC$ then diazonium salt is formed and by the coupling of diazonium salt and phenol azo dyes are prepared.
(a) When aniline is treated with $HN{O_2}$ at $0-5\,^oC$ then diazonium salt is formed and by the coupling of diazonium salt and phenol azo dyes are prepared.
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