Which statement is correct?

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(B) $Ni^{2+}$ ion has a $3d^8$ electronic configuration.In $[NiCl_4]^{2-}$, $Cl^-$ is a weak field ligand. It does not cause the pairing of electrons

Vedclass · Accepted Answer

$[NiCl_4]^{2-}$ is an outer orbital complex whereas $[Ni(CN)_4]^{2-}$ is an inner orbital complex.

Vedclass · Answer

(B) $Ni^{2+}$ ion has a $3d^8$ electronic configuration.In $[NiCl_4]^{2-}$, $Cl^-$ is a weak field ligand. It does not cause the pairing of electrons in the $3d$ orbitals. Therefore, the complex undergoes $sp^3$ hybridization, utilizing the $4s$ and $4p$ orbitals, making it an outer orbital complex.In $[Ni(CN)_4]^{2-}$, $CN^-$ is a strong field ligand. It causes the pairing of electrons in the $3d$ orbitals, leaving one $3d$ orbital vacant. Therefore, the complex undergoes $dsp^2$ hybridization, utilizing the $3d$, $4s$, and $4p$ orbitals, making it an inner orbital complex.

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