Pick out the correct statement with respect to `[Mn(CN)_(6)]^(3-)`:

Options

A. `d^(2) sp^(3) ` , inner orbital complex , paramagnetic , 2.87 B.M.
B. `d^(2) sp^(3)` , inner orbital complex , diamagnetic , zero magnetic moment .
C. `d^(2) sp^(3)` , outer orbital complex , paramagnetic , 3.87 B.M.
D. `dsp^(2)` , outer orbital complex , diamagnetic , zero magnetic moment

Answer

A

Explanation

In `[Mn(CN)_(6)]^(3-)` , oxidation state of Mn = + 3 , `Mn^(3+) = 3d^(4)`

It has two unpaired electrons .
`mu = sqrt(n (n + 2)) = sqrt(2 (2 + 2)) = sqrt8 = 2.87 B.M.`