At what pH does phenol react with benzene diazonium chloride to give a coupling product?

pH = 2

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pH = 3

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pH = 9

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pH = 7

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Solution

The correct option is C pH = 9
Basic medium (pH=9-10) is required for coupling reaction between phenol and benzene diazonium chloride. Phenol is converted to phenoxide ion which is more reactive.

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