Diazonium salt used in the preparation of phenol is obtained by treating _____ with nitrous acid.

Aniline

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N-methylaniline

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Nitrobenzene

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Chlorobenzene

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Solution

The correct option is A Aniline
A diazonium salt is formed by treating an aniline with nitrous acid (Obtained from a mixture of $N a N O_{2}$ and $H C l$ at low temperature of 273 K to 278 K. Hence option a is correct. the reaction is as follow:

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