Reduction of the metal centre in aqueous permanganate ion involves

Options

A. 3 electrons in neutral medium
B. 5 electrons in neutral medium
C. 3 electrons in alkaline medium
D. 5 electrons in acidic medium

Answer

A, D

Explanation

In acidic medium:
`MnO_4^(ɵ)+5e^(ɵ)toMn^(2+)` (`n` factor `=5)`
In strongly alkaline medium:
`MnO_4^(ɵ)+e^(ɵ)toMnO_4^(2-)` (n factor=1)
In weakly basic and neutral medium:
`MnO_2` (n factor`=3)`