Question

Assertion (A): undergoes S_N2 reactions faster than .

Reason (R): Iodine is a better leaving group because of its large size.

In the light of the above statements, choose the correct answer from the options given below:

Options

• Both A and R are true and R is the correct explanation of A.

• Both A and R are true but R is not the correct explanation of A.

• A is true but R is false.

• A is false but R is true.

Answer 1

Both A and R are true and R is the correct explanation of A.

Explanation:

Rate of S_N2 reaction is directly proportional to the leaving tendency of the leaving group. I⁻ is a better leaving group than Cl due to its bigger size.