Which of the following statement are correct about `Cr^(2+)` (Z = 24) and `Mn^(3+)` (Z = 25) ?
(i) `Cr^(2+)` is a reducing agent
(ii) `Mn^(3+)` is an oxidizing agent
(iii) Both `Cr^(2+)` and `Mn^(3+)` exhibit `d^(4)` configuration
(iv) When `Cr^(2+)` is used as a reducing agent, the chromium ion attains `d^(5)` electronic configuration

Options

A. `Cr^(2+)` is a reducing agent
B. `Mn^(3+)` is an oxidizing agent
C. Both `Cr^(2+)` and `Mn^(3+)` exhibit `d^(4)`electronic configuration
D. When `Cr^(2+)` is used as a reduding agent, the chormium ion attains `d^(5)`electronic configuration

Answer

D

Explanation

`Cr^(2+) rarr Cr^(3+)(3d^(4))`