Number of deactivating groups of the following is $-\mathrm{Cl},-\mathrm{SO}_3 \mathrm{H},-\mathrm{OH}…
Number of deactivating groups of the following is $-\mathrm{Cl},-\mathrm{SO}_3 \mathrm{H},-\mathrm{OH},-\mathrm{NHC}_2 \mathrm{H}_5,-\mathrm{COOCH}_3,-\mathrm{CH}_3$
4
3
2
1
Solution
The groups which withdraw electrons density from the benzene ring and make the benzene ring less reactive towards further electro philic substitution reaction.
Deactivating group : $-\mathrm{Cl},-\mathrm{SO}_3 \mathrm{H},-\mathrm{COO} \mathrm{CH}_3$