What is the number of unpaired electrons in [ | vedclass

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(D) The central metal ion is $Co^{3+}$. The atomic number of $Co$ is $27$,so the electronic configuration of $Co^{3+}$ is $[Ar] 3d^6$.$NH_3$ is a stro

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(D) The central metal ion is $Co^{3+}$. The atomic number of $Co$ is $27$,so the electronic configuration of $Co^{3+}$ is $[Ar] 3d^6$.$NH_3$ is a strong field ligand,which causes pairing of electrons in the $3d$ orbitals.In the presence of $NH_3$,the $6$ electrons in the $3d$ subshell pair up in the first three orbitals ($t_{2g}$ set).Thus,all $3d$ electrons are paired,and there are no unpaired electrons in the $[Co(NH_3)_6]^{3+}$ complex.

List-$I$ (Complexes)	List-$II$ (Hybridisation)
$A$. $[Ni(CO)_4]$	$I$. $sp^3$
$B$. $[Cu(NH_3)_4]^{2+}$	$II$. $dsp^2$
$C$. $[Fe(NH_3)_6]^{2+}$	$III$. $sp^3d^2$
$D$. $[Fe(H_2O)_6]^{2+}$	$IV$. $d^2sp^3$

What is the number of unpaired electrons in $[Co(NH_3)_6]^{3+}$ complex?

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List-$I$ (Complexes) List-$II$ (Hybridisation)

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