For reaction `aArarrxP` when [A] =2.2 m M, the rate was found to be 2.4 m `M s^(-1)` . On reducing concentration of A to half, rate changes to `0.06 m M s^(-1)` . The order of reaction with respect to A is :

Options

A. 1.5
B. 2
C. 2.5
D. `3.0`

Explanation

`r= k[A]^n` …(i)
`2.4 = k[2.2]^n` …(ii)
`0.6= k [1.1]^n` …(iii)
Dividint (ii) by (iii)
`:. 4= (2)^n or n = 2`