4 " mol of "a solution `A^(n+)` requires 1.6 " mol of "`MnO_4^(-)` ions for the oxidation of `A^(n+)` to `AO_3^(ɵ)` in acidic medium the value of n is (a). 1
(b). 2.
(c). 3.
(d). 4.

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`