4 " mol of "a solution containing `A^(n+)` requried 1.6 mon of `MnO_(4)^(ɵ)` for the oxidation to `A^(n+)` to `AO_(3)^(ɵ)` in acidic medium. The value of n is

Options

A. 1
B. 2
C. 3
D. 4

Answer

C

Explanation

`underset(x=+m)(A^(n+))tounderset(x-6=-)(AO_(3)^(-))` `underset(x=5)("undergoes oxidation")`
`therefore Number of `e^(-)` released in oxidation `=(5-n)`
`therefore Equivalents of `MnO_(4)^(ɵ)4xx(5-n)`
Equivalents of `MnO_(4)^(ɵ)=1.6xx5`
`therefore4xx(5-n)=1.6xx5`
`thereforen=3`