The number of moles of `KMn_(4)` that will be needed to react with one mole of sulphite ion in acidic medium is

Options

A. `2//5`
B. `3//5`
C. `4//5`
D. `1`

Answer

A

Explanation

`2MnO_(4)^(-)+5SO_(3)^(2-)+6H^(+) to2Mn^(2+)+5SO_(4)^(2-)+3H_(2)O`.
therefore2/5mole of `MnO_(4)^(-)` for one mole` SO_(3)^(2-)`.