`KMnO_(4)` acts as an oxidising agent in acidic medium. The number of moles of `KMnO_(4)` that will be needed to react with one mole of sulphide ions in acidic solution is

Options

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

Answer

A

Explanation

`underset("2 mol")(2KMnO_4) + 3H_(2)SO_(4) rarr K_2SO_4 + 2MnSO_(4) + 8H_(2)O + 5S`
`therefore `1 Mole of `S^(2-)` ions will require `KMnO_4 = (2)/(5)` moles.