Question

What will be the order of the reaction if doubling the concentration of a reactant increases the rate by a factor of 4 and trebling the concentration of the reactant by a factor of 9 ?

(a)  1

(b)  2

(c)  3

(d)  0

Answer 1

Correct option  (b) 2

2ⁿ =  4 3ⁿ = 9 :. n = 2