The correct order of magnetic moments (spin values in B.M.) among is:

Options

A. (a) `[Fe(CN)_6]^(4-)gt[CoCl_4]^(2-)gt[MnCl_4]^(2-)`
B. (b) `[MnCl_4]^(2-)gt[Fe(CN)_6]^(4-)gt[CoCl_4]^(2-)`
C. (c) `[Fe(CN)_6]^(4-)gt[MnCl_4]^(2-)gt[CoCl_4]^(2-)`
D. (d) `[MnCl_4]^(2-)gt[CoCl_4]^2gt[Fe(CN)_6]^(4-)`

Answer

D

Explanation

`Mn^(2+)`, `Fe^(2+)` and `Co^(2+)` has `3d^5`, `3d^6` and `3d^7` configurations having 5, 0 and 3 unpaired electrons respectively.