How would you account for the of the `d_(4)` species, `Cr^(2+)` is strongly reducing while manganese (III) is strongly oxidising.

Explanation

`E^(@)" value of "Cr^(3+//Cr^(2+)` in negative (-0.41 V) while that of `Mn^(3+)//Mn^(2+)` is positive (+1.57 V). This means that `Cr^(2+)` ions can lose electrons and can act as an oxidising agent.