Q. In electrophilic aromatic substitution reaction, the nitro group is $meta$ directing because it
A) Decreases electron density at $ortho$ and $para$ positions
B) Decreases electron density at $meta$ position
C) Increases electron density at $meta$ postion
D) Increases electron density at $ortho$ and $para$ positions
Explanation
(c)
When nitro group is present in the benzene nucleus, it withdraws electrons from $o$ and $p$-positions. Thus, the electron density at the $o$ and $p -$positions decreases. m-positions become positions of comparatively higher electron density and therefore, electrophilic attack occurs at m-positions.
Reviewed by Dr. Abubacker
Physics Educator & NEET/JEE Specialist
Ph.D. in Physics with 19+ years of teaching experience.