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. two
B. one
C. half
D. zero

Answer

C

Explanation

`r = K[A]^(m)`, also `2r = K[4A]^(m), (1)/(2) = ((1)/(4))^(m)`
`:. m = (1)/(2)`