Reaction : - `3ClO^(-) to ClO_3^(-) +2Cl^(-) ` occurs in following two steps
`(i) 2ClO^(-) rightarrow ClO_(2)^(-) +Cl^(-) ` ( slow step )
`(ii) ClO_(2) ^(-) +ClO^(-) overset(K_(2)) to ClO_(3)^(-) +Cl^(-) ` ( fast step)
then the rate of given reaction - ______.

Options

A. `K_(1)[ClO^(-)]^(2)`
B. `K_(1)[ClO^(-)]`
C. `K_(2)[ClO_(2)^(-)][ClO^(-)]`
D. `K_(1)[ClO^(-)]^(3)`

Answer

A

Explanation

Slowest step is the rate determining step . Hence `"Rate"=K_(1)[ClO^(-)]^(2)`