(a) What happens when Phenol is treated with benzene diazonium chloride? Give balance chemical equation.

Q. What happens when Acetaldehyde is treated with phenylhydrazene?

Q. What happens when benzene diazonium chloride reacts with potassium iodide? (write only equation of the reaction)

Q. When benzene diazonium chloride is treated with benzene diazonium chloride with hypophosphorous acid in presence of cuprous ions, benzene is obtained.

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