Which of the following is true for the speical having `3d^(4)` configuration ?

Options

A. `Cr^(2+)` is reducing in nature.
B. `Mn^(3+)` is oxidising in nature
C. Both (a) and (b)
D. None of these

Answer

C

Explanation

`Cr^(2+)` is reducing as its configuration, changes from `d^(5)` to `d.` , the latter having a half-filled `t_(2g)` level. On the other hand, the change from `Mn^(3+)` to `Mn^(2+)` results in the half-filled `(d^(5))` configuration which has extra stability.