The number of moles of `KMnO_(4)` that will be needed to react with `1 mol` of sulphite ion in acidic solution is

Options

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

Answer

A

Explanation

`{:(5e,+,Mn^(7+),rarr,Mn^(2+)),(,,S^(4+),rarr,S^(6+)+2e):}`
`:. 2` mole of `KMnO_(4) -= 5` mole of `SO_(3)^(2-)`