The rate of electrophilic substitution reacti | vedclass

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Question

(B) The rate of electrophilic substitution reaction in phenol is faster than in benzene.This is because the $-OH$ group is an electron-donating group

Vedclass · Accepted Answer

Faster than the rate of benzene

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(B) The rate of electrophilic substitution reaction in phenol is faster than in benzene.This is because the $-OH$ group is an electron-donating group due to its $+M$ (mesomeric) effect.The lone pair of electrons on the oxygen atom is delocalized into the benzene ring,which increases the electron density at the $o-$ (ortho) and $p-$ (para) positions.This makes the ring more susceptible to attack by an electrophile.

The rate of electrophilic substitution reaction in phenol is:

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