$\left[\mathrm{Co}\left(\mathrm{NH}_3\right)_6\right]^{3+}$ અને $\left[\mathrm{CoF}_6\right]^{3-}$ અનુક્રમે ક્યા છે?

Question

JEE MAIN 2024, Diffcult

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Solution

b
${\left[\mathrm{Co}\left(\mathrm{NH}_3\right)_6\right]^{3+}}$

$\mathrm{Co}^{3+}(\text { strong field ligand }) \Rightarrow 3 \mathrm{~d}^6\left(\mathrm{t}_{2 \mathrm{~g}}^6, \mathrm{e}_{\mathrm{g}}^0\right),$

Hybridisation : $d^2 \mathrm{sp}^3$

Inner obital complex(spin paired complex)

Pairing will take place.

$\left[\mathrm{CoF}_6\right]^{3-}$

$\mathrm{Co}^{3+}$ (weak field ligand) $\Rightarrow 3 \mathrm{~d}^6\left(\mathrm{t}_{2 \mathrm{~g}}^4, \mathrm{e}_{\mathrm{g}}^2\right)$

Hybridisation : $\mathrm{sp}^3 \mathrm{~d}^2$

Outer orbital complex (spin free complex) no pairing will take place

સૂચિ $I$ સવર્ગ સંકીર્ણ	List $II$ અયુગ્મિત ઈલેક્ટ્રોનોની સંખ્યા
$A$ $\left[ Cr ( CN )_6\right]^{3-}$	$I$ $0$
$B$ $\left[ Fe \left( H _2 O \right)_6\right]^{2+}$	$II$ $3$
$C$ $\left[ Co \left( NH _3\right)_6\right]^{3+}$	$III$ $2$
$D$ $\left[ Ni \left( NH _3\right)_6\right]^{2+}$	$IV$ $4$

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