Q.

Amongst the compounds given, the one that would form a brilliant coloured dye on treatment with NaNO2 in dil. HCI followed by addition to an alkaline solution of β- naphthol is

Moderate

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a

b

c

d

answer is C.

(Detailed Solution Below)

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Detailed Solution

As we know, benzenediazonium salt forms brilliant coloured dye with β- naphthol, the compound under consideration must be p-toluidine (c) as it is a primary aromatic amine.Primary aromatic amine, on treatment with NaNO2 in dil. HCI forms the corresponding diazonium chloride salt.
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