The ( $- O H$ ) group attached to a carbon of benzene ring _________ it towards electrophilic substitution.

activates

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deactivates

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has no effect on

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sometimes activates and sometimes deactivates

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Solution

The correct option is B activates
The $- O H$ group is an electron-donating group. Thus, it increases the electron density in the benzene ring as shown in the given resonance structure of phenol. As a result, the benzene ring is activated towards electrophilic substitution.

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o, p -

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