For a chemical reaction `A rarr B`, it is found that the rate of reaction doubles when the concentration of `A` is increased `4` times. What is the order of reaction ? Suggest the rate law also.

Options

A. 4
B. 0
C. `1//2`
D. 1

Answer

C

Explanation

`r=k[A]^(n)`
`2r=k[4A]^(n)`
Dividing (ii) by (i) `(2r)/(r)=(k)/(k)[(4A)/(A)]^(n)`
or `2=2^(2n)or 2n=1or n=1//2`