Which of the following complexes is diamagnet | vedclass

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(D) For $[CoF_6]^{3-}$,$Co^{3+}$ is $3d^6$. It undergoes $sp^3d^2$ hybridization,resulting in an octahedral geometry and it is paramagnetic.For $[Co(N

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$[Ni(CN)_4]^{2-}$

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(D) For $[CoF_6]^{3-}$,$Co^{3+}$ is $3d^6$. It undergoes $sp^3d^2$ hybridization,resulting in an octahedral geometry and it is paramagnetic.For $[Co(NH_3)_6]^{3+}$,$Co^{3+}$ is $3d^6$. It undergoes $d^2sp^3$ hybridization due to the strong field ligand $NH_3$,resulting in an octahedral geometry and it is diamagnetic.For $[NiCl_4]^{2-}$,$Ni^{2+}$ is $3d^8$. It undergoes $sp^3$ hybridization,resulting in a tetrahedral geometry and it is paramagnetic.For $[Ni(CN)_4]^{2-}$,$Ni^{2+}$ is $3d^8$. The strong field ligand $CN^-$ causes pairing of $3d$ electrons,leading to $dsp^2$ hybridization,a square planar geometry,and it is diamagnetic.

Which of the following complexes is diamagnetic and square planar?

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