MnO(4)^(2-)undergoes disproportionation ...

`MnO_(4)^(2-)`undergoes disproportionation reaction in acidic medium but `MnO_(4)^(-)`does not .Give reason.

Text Solution

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The oxidation number of Mn in `MnO_(4)^(-)` is +7 , which is the highest oxidation that Mn can possess .So does not undergoes disproportionation reaction
Again is case of `MnO_(4)^(2-)` , the oxidation number of Mn is +6 . Therefore ,Mn is `MnO_(4)^(2-)` can increase its oxidation undergoes disproportionation reaction as given below
In the given above reactio the oxidation number of Mn increases from +6 in `Mn_(4)^(2-)` to +7 in `MnO_(4-)^(-)`and decreases to +4 in `MnO_(2-)`

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`HCIO_(3)` and `CI_(2)O`

`HCIO_(2)` and `HCIO_(4)`

`HCI and CI_(2)O`

`HCI and HCIO_(3)`

In alkaline medium, MnO_(4)^(-) oxides I^(-) to -

`IO_(3)^(-)`

`I_(2)`

`IO^(-)`

`IO_(4)^(-)`

Which of the followings undergoes disproportionation reaction with water-

`SO_(3)`

`F_(2)`

`Cl_(2)`

`N_(2)`