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(i) How can you prepare phenol from chl...

(i) How can you prepare phenol from chlorobenzene?
(ii) What happens when phenol is heated with zinc dust?
(iii) Write the coupling réaction of BDG with phenol.

Text Solution

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(iii) When benzene diazonium chloride (BDC) is treated with alkaline solution of phenol, then para-hydroxyazobenzene is formed. This reaccion takes place at `0–5^@C` and known as coupling reaction. The products are used as dyes and indicators.
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