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

1. $\text{P}>\text{Q}>\text{R}>\text{S}$
2. $\text{S}>\text{P}>\text{R}>\text{Q}$
3. $\text{P}>\text{R}>\text{Q}>\text{S}$
4. $\text{R}>\text{P}>\text{S}>\text{Q}$

Solution

Relative reactivity for S_N2 reaction in the given structures is
 

Substrate		CH3Cl	H2C = CH - CH2Cl
Relative Rates Towards SN2	100000	200	79	0.02

Asked in: JEE Advanced 2013 (Paper 1)

Practice more General Organic Chemistry questions on Aicharya