Question

convert phenol into p-hydroxy azobenzene

Answer 1

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Answer 2

Answer:

We have to first convert the phenol into benzene diazonium salt in the presence of HNO2  and then we have to react it with beta naphthol which  

will give rise to p-hydrozyazobenzene which is orange dye in colour.

Now when the phenol reacts with the above prepared benzene diazonium chloride in the presence of NaOH, will gives p-hydroxy azobenzene.