How to prepare phenol from aniline?

From aniline phenol can be prepared.
Aniline is diazotized by treatment with nitrous acid (NaNO2 and HCl) under ice-cold conditions to form benzene diazonium chloride. This is followed by hydrolysis with dilute sulphuric acid to form phenol.

C6H5−NH2+ HNO2+ HCl → C6H5−N2+Cl+ 2H2O

C6H5−N2+Cl+ H2O → C6H5−OH + N2↑ + HCl

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