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Q. Which of the following compounds will be most easily attacked by an electrophile?

UP CPMTUP CPMT 2015

Solution:

All $—OH$, $—Cl$, $— CH_{3}$ groups in benzene are ortho-para directing groups and activate the ring towards electrophilic substitution reaction. But, among these $—OH$ group is strongly activating while $—CH_{3}$ is weakly activating and $—Cl$ is deactivating. Thus, phenol will be most easily attacked by an electrophile