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  4. When phenol reacts with phthalic anhydride in presence of H 2 SO 4 and heated and hot reaction mixture is poured in NaOH solution, then product formed is

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Q. When phenol reacts with phthalic anhydride in presence of $H _{2} SO _{4}$ and heated and hot reaction mixture is poured in $NaOH$ solution, then product formed is

AIIMSAIIMS 2008Alcohols Phenols and Ethers

Solution:

Phenol couples with phthalic anhydride in presence of cone. H2SO4 to form phenolphthalein which is used as an indicator :

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