`Mn^(2+)` compounds are more stable than `Fe^(2+)` compounds towards oxidation to their +3 state, because

Options

A. `Mn^(2+)` is more stable with high 3rd ionisation energy
B. `Mn^(2+)` is bigger in size
C. `Mn^(2+)` has completely filled d- orbitals
D. `Mn^(2+)` does not exist

Answer

a

Explanation

`Mn^(2+)` has stable half - filled electronic configuration thus it has high third ionisation energy while `Fe^(2)` on losing one more electron will acquire this stable electronic configuration.
Thus `Fe^(2+)` is more prone to get oxidised to +3 oxidation state .