Define carbolicacid (phenol) how carbolic acid is prepared from benzen sulphonic acid ?
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Preparation of carbolic acid (phenol) from benzene sulphonic acid:
Treatment of benzene sulphonic acid with NaOH gives sodium salt of benzene sulphonic acid. This sodium salt is heated with NaOH at 350
0
to form sodium salt of phenol. The acid hydrolysis of sodium salt gives phenol.
The action of neutral ferric chloride on phenol gives violet coloured complex.
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