Haloalkanes And Haloarenes Ques 43
43. The replacement of chlorine of chlorobenzene to give phenol requires drastic conditions, but the chlorine of $2,4$-dinitrochlorobenzene is readily replaced since,
[1997]
(a) nitro groups make the aromatic ring electron rich at ortho/para positions
(b) nitro groups withdraw electrons from the meta position of the aromatic ring
(c) nitro groups donate electrons at meta position
(d) nitro groups withdraw electrons from ortho/para positions of the aromatic ring
Show Answer
Answer:
Correct Answer: 43.(d)
Solution:
- (d) $-NO_2$ group is electron attracting group, so it is able to deactivate the benzene ring.
Hence, withdrawl of electrons from ortho & para position cause easy removal of $-Cl$ atom due to development of $+ve$ charge on $o$ - and $p$ - positions.
BETA
