Chemistry - Complete d-block Question with Solution | TestHub

${\mathrm{Co}}^{3+}\to 3{\mathrm{d}}^6\Rightarrow {\mathrm{t}}_{2g}^{2,1,1}{\mathrm{e}}_{\mathrm{g}}^{1,1}$, unpaired electron = 4

${\mathrm{Fe}}^{3+}\to 3{\mathrm{d}}^5\Rightarrow {\mathrm{t}}_{2\mathrm{g}}^{1,1,1}{\mathrm{e}}_{\mathrm{g}}^{1,1}$ unpaired electron $=5$

${\mathrm{Mn}}^{3+}\to 3{\mathrm{d}}^4\Rightarrow {\mathrm{t}}_{2\mathrm{g}}^{1,1,1}{\mathrm{e}}_{\mathrm{g}}^{1,0}$ unpaired electron = 4