MHT CET 2025 Chemistry question

Identify the medium required for formation of p-Hydroxyazobenzene from benzene diazonium chloride and phenol

(A)Strong acidic
(B)Mild alkalineCorrect
(C)Alcoholic
(D)Ether

Answer: (B)

Solution

Benzenediazonium chloride couples with phenol (azo coupling, an electrophilic substitution) to give p-hydroxyazobenzene (an orange dye): . In mildly alkaline medium phenol is partly converted to the phenoxide ion, which

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Question ID VK-102811