Assertion: The reaction between a diazo salt and an aromatic amine or a phenol, giving an aminoazo or hydroxyazo compounds is called coupling reaction. Reason: Condensation of diazonium salt with phenol is carried out in weakly acidic medium.

Assertion: The reaction between a diazo salt and an aromatic amine or

1.	Assertion: The reaction between a diazo salt and an aromatic amine or a phenol, giving an aminoazo or hydroxyazo compounds is called coupling reaction. Reason: Condensation of diazonium salt with phenol is carried out in weakly acidic medium.
Answer» If both assertion and reason are true and the reason is the correct explanantion of the assertion. If both assertion and reason are true but reason is not the correct explanantion of the assertion. If assertion is true but reason is false. If the assertion and reason both are false. Solution :Condensation of diazonium salt with phenol is carried out in weakly alkaline medium, (pH-9). This is due to the FACT that in strongly acid medium the -OH of a phenol remains UNIONISED, and an amine forms a salt. Phenol exists as phenoxide ION and the latter is READILY substituted by electrophiles than phenol itself. Thus, in phenol, coupling is carried out in alkaline medium.