Q.
KI in acetone, undergoes $S_{N}2$ reaction with each of P, Q, R and S. The rates of the reaction vary as

Haloalkanes and Haloarenes
Solution:
Relative reactivity for $S_{N}2$ reaction in the given structures is
Column I
Column II
Substrate

$CH_3Cl$
$H_2C = CH - CH_2Cl$

(S)
(P)
(R)
(Q)
Relative Rates Towards $S_N2$
100000
200
79
0.02
Column I | Column II | |||
---|---|---|---|---|
Substrate | ![]() |
$CH_3Cl$ | $H_2C = CH - CH_2Cl$ | ![]() |
(S) | (P) | (R) | (Q) | |
Relative Rates Towards $S_N2$ | 100000 | 200 | 79 | 0.02 |