M.Sc. Bio-Physics (PU-CET P.G) 2019 Panjab University Entrance Exam With Answers
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10.
Replacement of Cl of chlorobenzene to give phenol requires drastic conditions, but Cl of 2,4 dinitro chlorobenzene is readily replaced. This is because,
A:
-NO2 group makes the ring electron rich at ortho and para positions
B:
-NO2 group withdraws electrons from meta position
C:
-NO2 donates electrons at meta position
D:
-NO2 withdraws electron from ortho and para positions
