Assertion :A reaction between a diazo salt and an aromatic amine or a phenol, giving an amino-azo or hydroxy-azo compound is called coupling reaction. Because Reason: Condensation of diazonium with phenol is carried out in weakly acidic medium.

Both Assertion and Reason are correct and Reason is the correct explanation for Assertion

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Both Assertion and Reason are correct but Reason is not the correct explanation for Assertion

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Assertion is correct but Reason is incorrect

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Both Assertion and Reason are incorrect

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Solution

The correct option is C Assertion is correct but Reason is incorrect
Coupling reaction:
The reaction involves joining two aromic rings through the $- N = N -$ bond. Arenediazoniu saltsmsuch as benzene diazonium salts react with phenol or aromatic amines to form coloured azo compounds.
(Ref. image)
An azo coupling is an organic reaction between a diazonium compound and another aromatic compound that produces an azo compound. In this electrophilic aromatic substitution reaction, the aryldiazonium cation is the electrophile and the activated arene is a nucleophile.
Phenol reacts with benzenediazonium chloride to give a yellow-orange azo compound. The reaction is base-catalysed.

Therefore, the assertion is correct but reason is incorrect.

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