Assertion (A): Coupling reaction of benzene diazonium chloride is an example of electrophilic substitution.
Reason (R): In coupling reactions benzene diazonium ion acts as electrophile.

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(A) is true but (R) is false

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

Both (A) and (R) are false

answer is A.

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Detailed Solution

The coupling reaction of benzene diazonium chloride is a reaction between benzene diazonium chloride and phenol to form p-hydroxyazobenzene.

P-hydroxyazobenzene is an orange dye.

Based on the mechanism of this reaction we found that the benzene diazonium ion acts as an electrophile in the above coupling reaction. So, it is an electrophilic substitution reaction.

Thus, both assertion and reason are true and the reason is the correct explanation of assertion.

Hence, option (A) is correct.

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