Q. A given nitrogen-containing aromatic compound $A$ reacts with $S n / H Cl$ , followed by $H N O_{2}$ to give an unstable compound $B$ . $B$ , on treatment with phenol, forms a beautiful coloured compound $C$ with the molecular formula $C_{12} H_{10} N_{2} O$ . The structure of compound $A$ is

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17%

67%

10%

Solution:

Q. 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 C12​H10​N2​O. The structure of compound A is