1.

The species that undergoes diproportionation in an alkaline medium are:

Answer»

`Cl_(4)`
`MnO_(4)^(2-)`
`NO_(2)`
`ClO_(4)^(-)`

Solution :`MnO_(4)^(2-), Cl_(2) and NO_(2)` undergo disproportional, oxidation and reduction simultaneously take place in the alkaline mediujm.
`Cl_(2)+2NAOH to NACL +NaOCl+H_(2)O`
`2NO_(2)+2NaOH to NaNO_(2)+NaNO_(3)+H_(2)O`
`MnO_(4)^(2-)` is stable in STRONG alkali solution and disproportionate into `MnO_(4)^(-) and MnO_(2)` is less basic, Acidic and Neutral medium.


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