A) decreases electron density at ortho and para positions
B) decreases electron density at meta position
C) increases electron density at meta position
D) increases electron density at ortho and para positions
Correct Answer: A
Solution :
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.
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