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Preparation of Alkyl Halides

Which of the ...

Question

Which of the following reacts with $N a N O_{2} + H C l$ followed by warming with water to give phenol?

C_{6} H_{5} C H_{2} N H C H_{3}

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(C H_{3})_{2} N H

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C H_{3} N H_{2}

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C_{6} H_{5} N H_{2}

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Solution

The correct option is D $C_{6} H_{5} N H_{2}$
When an aromatic primary amine is treated with $(N a N O_{2} + H C l)$ acid at $0 - 5^{o} C$ , diazonium salts are obtained. These diazonium salts are highly reactive in nature. Upon warming with water, these diazonium salts finally hydrolyze to phenol. Phenol can also be obtained from diazonium salts by treating it with dilute acids. The reaction is as follows:

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