Chemistry - Coordination Chemistry Question with Solution | TestHub

As${\mu }_s=\sqrt{n\left(n+2\right)}$
Complex (II)$\to {\mathrm{Fe}}^{+2}⟹\mathrm{S}.\mathrm{F}.\mathrm{L}⟹{{\mathrm{t}}_{2\mathrm{g}}}^{2,2,2}{\mathrm{eg}}^{0,0}⟹{\mathrm{\mu }}_{\mathrm{s}}=0$
Complex (I)$\to {\mathrm{Cr}}^{+2}\Rightarrow \mathrm{W}.\mathrm{F}.\mathrm{L}\Rightarrow {{\mathrm{t}}_{2\mathrm{g}}}^{1,1,1}{\mathrm{eg}}^{1,0}\Rightarrow {\mathrm{\mu }}_{\mathrm{s}}=\sqrt{24}\mathrm{B}.\mathrm{M}$
Complex (IV)$\to {\mathrm{Co}}^{+2}\Rightarrow \mathrm{W}.\mathrm{F}.\mathrm{L}\Rightarrow {\mathrm{e}}_{\mathrm{g}}^{2,2,}{\mathrm{t}}_{2\mathrm{g}}^1,1,1,\Rightarrow {\mathrm{\mu }}_{\mathrm{s}}=\sqrt{15}\mathrm{B}.\mathrm{M}$
Complex (III)$\to {\mathrm{Fe}}^{+3}\Rightarrow \mathrm{S}.\mathrm{F}.\mathrm{L}\Rightarrow {{\mathrm{t}}_{2\mathrm{g}}}^{1,1,1}{\mathrm{eg}}^{0,0}\Rightarrow {\mathrm{\mu }}_{\mathrm{s}}=\sqrt{3}\mathrm{B}.\mathrm{M}$