Question

Rank the following in order of decreasing rate of solvolysis with aqueous ethanol (fastest $\to$ slowest)

• A. $2>1>3$
• B. $1>2>3$
• C. $2>3>1$
• D. $1>3>2$

Answer 1

The correct option is C $2>3>1$

Hence the rate of solvolysis depends on the stability of intermediate formed as reaction with aqueous ethanol.

Rate of solvolysis $\propto$stability of intermediate.

Here,the intermediate formed in (2) is most stable due to the +I effect of both $C{H}_3$- and $C_6{H}_6$group

Therefore stability order is (2)>(3)>(1)

Therefore,rate of solvolysis is (2)>(3)>(1)

Hence, option $C$ is correct.