Question:
Identify the correct statements:
The presence of –NO\(_2\) group in benzene ring
A. activates the ring towards electrophilic substitutions.
B. deactivates the ring towards electrophilic substitutions.
C. activates the ring towards nucleophilic substitutions.
D. deactivates the ring towards nucleophilic substitutions.
Choose the correct answer from the options given below:
Identify the correct statements:
The presence of –NO\(_2\) group in benzene ring
A. activates the ring towards electrophilic substitutions.
B. deactivates the ring towards electrophilic substitutions.
C. activates the ring towards nucleophilic substitutions.
D. deactivates the ring towards nucleophilic substitutions.
Choose the correct answer from the options given below:
Show Hint
Electron-withdrawing groups like \(-\ce{NO2}\) always deactivate benzene rings for both electrophilic and nucleophilic substitutions.
Electron-donating groups (e.g., \(-\ce{OH}, -\ce{NH2}\)) activate the ring towards electrophilic substitution.
Updated On: Feb 4, 2026
- A and D Only
- B and C Only
- C and A Only
- B and D Only
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The Correct Option is D
Solution and Explanation
Concept:
The nitro group (\(-\ce{NO2}\)) is a strong electron-withdrawing group due to both \(-I\) (inductive) and \(-M\) (mesomeric) effects.
It reduces electron density on the benzene ring, making it less reactive towards electrophilic substitution.
It also destabilizes the intermediate carbocation formed during electrophilic substitution.
For nucleophilic substitution, the \(-\ce{NO2}\) group withdraws electron density, making the ring less susceptible to nucleophilic attack as well.
Step 1: Electrophilic substitution. - \(-\ce{NO2}\) deactivates the ring towards electrophilic substitution. So, statement B is correct.
Step 2: Nucleophilic substitution. - \(-\ce{NO2}\) also deactivates the ring towards nucleophilic substitution because it reduces electron density and destabilizes intermediates. So, statement D is correct.
Step 3: Conclusion. Correct statements: B and D. \[ \text{Answer: Option (4)} \]
It reduces electron density on the benzene ring, making it less reactive towards electrophilic substitution.
It also destabilizes the intermediate carbocation formed during electrophilic substitution.
For nucleophilic substitution, the \(-\ce{NO2}\) group withdraws electron density, making the ring less susceptible to nucleophilic attack as well.
Step 1: Electrophilic substitution. - \(-\ce{NO2}\) deactivates the ring towards electrophilic substitution. So, statement B is correct.
Step 2: Nucleophilic substitution. - \(-\ce{NO2}\) also deactivates the ring towards nucleophilic substitution because it reduces electron density and destabilizes intermediates. So, statement D is correct.
Step 3: Conclusion. Correct statements: B and D. \[ \text{Answer: Option (4)} \]
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