Q. Electrophilic substitution reaction in phenol take place at:

 1969  182 Rajasthan PMTRajasthan PMT 2002Alcohols Phenols and Ethers Report Error

Solution:

In phenol,
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oxygen atom containing two lone pair of electrons activates the benzene ring by increasing electron density at ortho and para position. Hence, the electrophile (electron deficient species) attacks on ortho and para position.