Walden inversion takes place in `SN^2` reaction.
Half-life period of `SN^2` reaction is inversely proportional to the concentration of the substrate or nucleophile or both.

Options

A. If both `(A)` and `(R )` are true, but `( R)` is the correct explanation of `(A)`
B. If both `(A)` and `( R)` are true, but `(R )` is not the correct explanation of `(A)`.
C. If `(A)` is true but `( R)` is false.
D. If `(A)` is false but `( R)` is true.

Answer

B

Explanation

`T_(1//2)` of second order reaction `prop (a)^(-1)`, where (a) is the initial concentration of the reactant or nucleophile or both.