What is the over all order of reaction which has the following rate expression? Rate = $k[A]^{1/2} [B]^{3/2}$

Two

The correct answer is Option (2) → Two

The overall order of the reaction is two.

The overall order of a reaction is obtained by adding the powers of the concentration terms in the rate law.
Given rate expression: Rate = k[A]¹⁄² [B]³⁄²

Order with respect to A = 1/2
Order with respect to B = 3/2

Overall order = 1/2 + 3/2 = 2

Therefore, the reaction is a second-order reaction.