Question

A group which deactivates the benzene ring towards electrophilic substitution but directs the reaction at ortho and para position:

• A. $-N{H}_2$
• B. $-Cl$
• C. $-N{O}_2$
• D. $-C_2{H}_5$

Answer 1

The correct option is B $-Cl$

$-N{H}_2$ is activating group due to $+M$ effect.
$-N{O}_2$ is a deactivating group due to $-M$ effect.
$-C{H}_3$ is activating group due to $+I$ effect.
$-Cl$ is deactivating group due to $-I$ effect but it is ortho, para directing due to $+M$ effect.