Which of the following arrangements represent increaseing oxidation number of the central atom?

Options

A. `CrO_(2)^(-),CIO_(3)^(-),CrO_(4)^(-),MnO_(4)^(-)`
B. `CIO_(3)^(-),CrO_(4)^(2-),MnO_(4)^(-),CrO_(2)^(-)`
C. `CrO_(4)^(-),CIO_(3)^(-),MnO_(4)^(-),CrO_(4)^(2-)`
D. `CrO_(4)^(2-),MnO_(4)^(-),CrO_(2)^(-),CIO_(3)^(-)`

Answer

A

Explanation

The O.N of central atom in the different ions is:
`CrO_(2)^(-):x-4=-1or x=+3`
`CIO_(3):x-6=-1 or x=+5`
`CrO_(4)^(2-): x-8=-2orx=+6`
`MnO_(4)^(-):x-8=-1or x=+7`
therefore is the correct increasing order.