4. Which of the following compound on diazotisation followed by coupling with 2 naphthol will form an azo-dye? (i. p-toluidine ii. benzylamine iii. N-methylamine?)
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The compound on diazotization followed by coupling with is p-Toluidine becoz it is primary aromatic amines.
primary amines or primary aromatic amines are good nucleophiles that's why they undergo the coupling reactions.
the name of aromatic amines is aniline (C6H5NH2).
so ,option 1st is correct answer.
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