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  4. Aniline reacts with NaNO2 and HCl at room temperature to give

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Q. Aniline reacts with $ NaNO_{2} $ and $ HCl $ at room temperature to give

Uttarkhand PMTUttarkhand PMT 2007

Solution:

At room temperature, initially formed diazonium chloride decomposes to give phenol.
$C_6H_5NH_2 \xrightarrow[\text{room temp.}]{NaNO_2/HCl} \underset{\text{benzene diazonium chloride}}{[C_6H_5 - N^+ \equiv NCl^-]}$ $\xrightarrow[HCl, -N_2]{H_2O} \underset{\text{phenol}}{C_6H_5OH}$