Question

Presence of a nitro group in a benzene ring

• A. activates the ring towards electrophilic substitution
• B. renders the ring basic
• C. deactivates the ring towards nucleophilic substitution
• D. deactivates the ring towards electrophilic substitution

Answer 1

Answer: (D)

deactivates the ring towards electrophilic substitution

Answer 2

$- NO_2$ group shows - M effect, so withdraws the electron density from the ring and hence deactivate the ring towards electrophilic aromatic substitution. Hence, (4) is correct.