1.

In acidicmedium, MnO_(4)^(2-)

Answer»

disproportionates to `MnO_(2)`to `MnO_(4)^(-)`
is OXIDIZED to `MnO_(4)^(-)`
is REDUCED to `MnO_(2)`
is reduced to `Mn^(2+)`

Solution :`MnO_(4)^(2-)`disproportionates in ACIDIC medium asfollows `:`
`3MnO_(4)^(2-) + 4H^(+) RARR 2MnO_(4)^(-) + MnO_(2) + 2H_(2)O`


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