Question

A given nitrogen-containing aromatic compound A reacts with Sn/HCl, followed by HNO₂ to give an unstable compound B. B, on treatment with phenol, forms a beautiful coloured compound C with the molecular formula C₁₂H₁₀N₂O. The structure of compound A is

Answer 1

The answer is 2 nitrobenze as it reacts with Sn/HCl to give aniline ( benzene with a NH2)

which on further reaction with HNO2 gives diazonium salt ( benzene with an N2 +) which is an unstable compound when reacted with phenol it gives parahydroxyazobenzene

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