consider the nucleopholic attacks given below ,select in each pair that shows the greater `S_(N^(2))`?

Consider the nucleophilic attacks given below. Select in each pair that shows the greater S_(N^2) reaction rate.

Consider the structures given below They are

Consider the reaction given below :

Consider the reaction given below :

Select the member of each pair that shows rate of S_(N)2 reaction with KI in acetone.

Select the member of each pair that shows rate of S_(N)2 reaction with KI in acetone.

Select the member of each pair that shows rate of S_(N)2 reaction with KI in acetone.

What is the figure given below showing n particular ?