Q.
$MnO_{4}^{-}$ is a good oxidising agent in different media where it changes to
$ \rightarrow Mn^{2 +}$
$ \rightarrow MnO_{4}^{2 -}$
$ \rightarrow MnO_{2}$
$ \rightarrow Mn_{2}O_{3}$
The oxidation number of Mn correspondingly reduces by
NTA AbhyasNTA Abhyas 2020The d-and f-Block Elements
Solution: