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Standard XII

Chemistry

Preparation of Alkanes with Grignard Reagent

A given nitro...

Question

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

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Solution

The correct option is B
Compound A is aromatic.
Only amine group react with $H N O_{2}$ to diazonium salt which is a unstabek compound.
Also, $S n / H C l$ will only reduce nitro group to amine.
Thus, compound A is an aromatic nitro compound.
Benzene diazonium salt with phenol undergoes coupling reaction to give diazo compounds.

Thus, option (c) is correct.

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

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