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Chemistry
Azo dye is prepared by the coupling of phenol and
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Q. Azo dye is prepared by the coupling of phenol and
Amines
A
diazonium chloride
B
$o$-nitroaniline
C
benzoic acid
D
chlorobenzene
Solution:
Azo dye is prepared by diazo coupling reaction of phenol with diazonium salt.
$(- N = N -)$ group is called azo - group