`MnO_(4)^(2-)` (`1` mole) in neutral aqueous medium is disproportionate to

Options

A. `2//3` mole of `MnO_4^(-)` and 1/3 mole of `MnO_2`
B. `1//3` mole of `MnO_4^(-)` and 2/3 mole of `MnO_2`
C. `1//3` mole of `Mn_2O_7` and 1/3 mole of `MnO_2`
D. `2//3` mole of `Mn_2O_7` and 1/3 mole of `MnO_2`

Answer

A

Explanation

1 mole of `MnO_4^(2-)` is disproportionate to `2/3` mole of `MnO_(4)^(-)` and `1/3` mole of `MnO_2`