Question

For reaction aA → xP, when [A] = 2.2 mM, the rate was found to be 2.4 mM s^-1. On reducing concentration of A to half, the rate changes to 0.6 mM s^-1. The order of reaction with respect to A is

(a) 1.5

(b) 2.0

(c) 2.5

(d) 3.0

Answer 1

Correct option (b) 2.0

Explanation:

On reducing the concentration of A to half, the rate of reaction is decreased by four times.

Rate of reaction : [A]² ; Order of reaction = 2