JEE Advanced 2014 Chemistry question

For the identification of β-naphthol using dye test, it is necessary to use

(A)dichloromethane solution of β-naphthol.
(B)acidic solution of β-naphthol.
(C)neutral solution of β-naphthol.
(D)alkaline solution of β-naphthol.Correct

Answer: (D)

Solution

In the dye test, β-naphthol is coupled with benzenediazonium chloride to give an orange-red azo dye (1-phenylazo-2-naphthol). The coupling requires the phenoxide (naphthoxide) ion, whose

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Question ID VK-026330