Aniline [HCl, ,278 ,K] NaNO_2 A HBF_4 B The compounds A and B, respectively, are

JEE Main Chemistry question

Aniline A B

The compounds and , respectively, are

(A)Nitrobenzene and fluorobenzene
(B)Phenol and benzene
(C)Benzenediazonium chloride and fluorobenzeneCorrect
(D)Nitrobenzene and chlorobenzene

Answer: (C)

Solution

Aniline treated with at low temperature (around 273–278 K) undergoes diazotisation to give benzenediazonium chloride, . This diazonium salt, treated with and

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Question ID VK-148095