The number of moles of `KMnO_4` that are needed to react completely with one mole of ferrous oxalate in acidic solution is

Options

A. `(1)/(5)`
B. `(2)/(5)`
C. `(3)/(5)`
D. `(5)/(3)`

Answer

C

Explanation

`MnO_(4)^(ɵ)` oxidises `Fe^(2+)` and `C_(2)O_(4)^(2-)` both.
`Fe^(2+)+C_(2)O_(4)^(2-)toFe^(3+)+2CO_(2)+3e^(-)`
`MnO_(4)^(ɵ)+5e^(-)toMn^(2+)`
`5FeC_(2)O_(4)-=3MnO_(4)^(ɵ)`
`1 FeC_(2)O_(4)-=(3)/(5)MnO_(4)^(ɵ)`