For a reaction `A rarr B`, the rate of reaction quadrupled when the concentration of `A` is doubled. The rate expression of the reaction is `r = K[A]^(n)` when the value of `n` is

Options

A. 1
B. zero
C. 3
D. 2

Explanation

(i) `r_(1) = k (A)^(x) ` and (ii) `4 r_(2) = k [2A]^(x)` .
Dividing (ii) by (i) ,
`4 = 2^(x)` or x = 2
`4 = 2^(x) or x =2` .