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Assertion (A): During diazotization, excess of $HCl$ is used with ${NaNO}_{2}$ .
Reason (R): Excess of $HCl$ prevents the hydrolysis of diazonium salt.

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Both (A) and (R) are true and (R) is the correct explanation of (A)

Both (A) and (R) are true and (R) is not the correct explanation of (A)

(A) is true but (R) is false

Both (A) and (R) are false

answer is C.

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Detailed Solution

Diazotization reaction,

In the diazotization reaction, to avoid the azo coupling we use $HCl$ in excess.

So, to suppress the concentration of free aniline available for coupling excess of $HCl$ is used in diazotization reactions.

Thus, the assertion is true but the reason is false.

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