Identify the compound Y in the following reaction.

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Solution

When a primary aromatic amine, dissolved or suspended in cold aqueous in cold aqueous mineral acid and treated with sodium nitrite, a diazonium salt is formed When this freshly prepared diazonium salt is mixed with cuprous chloride, then diazonium group is replaced by -Cl.

Then chlorobenzene is formed which is y in this reaction.

Hence, option (a) is correct.

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3 C H_{3} - C H_{2} - O H + A \to 3 C_{2} H_{5} - C l + H_{3} P O_{3}

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