1.

How many mole of electrons are involved in the reduction of one mole of `MnO_(4)^(-)` ion in alkaline medium to `MnO_(3)^(-)`A. 1B. 2C. 5D. 3

Answer» Correct Answer - D
In alkaline medium, `KMnO_(4)` acts as an oxidising agent as follows -
`MNO_(4)^(-)+2H_()O+3e^(-)rarrMnO_(2)+4OH^(-)`
Thus three electrons per molecule of are involved.


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