The diazonium salt of which of the following compounds will form a coloured dye on reaction with $$\beta$$-Naphthol in NaOH?

Solution

To form a colored azo dye with $$\beta$$-naphthol in NaOH, the compound must be a primary aromatic amine. This means the amine group ($$-NH_2$$) must be attached directly to a benzene ring (for example, aniline or a substituted aniline). Thus the correct option is B.