The highest oxidation state of `Mn` is shown by

Options

A. `KMnO_(4)`
B. `K_(2)MnO_(4)`
C. `MnO_(2)O_(3)`
D. `MnO_(2)`

Answer

A

Explanation

The species in which an element has oxidation number lying in between its minimum and maximum values can acts as oxidant and reductant both.
Oxidation state in species `O^(-)" in "H_(2)O_(2)`
Minimum oxidation state
Maximum oxidation state
Thus, hydrogen peroxide `(H_(2)O_(2))` can act as an oxidising as well as a reducing agent.
`H_(2)O_(2)` as an reducing agent:
`Ag_(2)O+H_(2)O_(2) to 2Ag+H_(2)O+O_(2)`
`H_(2)O_(2)` as an oxidising agent
`PbS+4H_(2)O_(2) to PbSO_(4)+4H_(2)O`