Identify the correctly matched set from the f | vedclass

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(A) $1$. For $[NiCl_4]^{2-}$,$Ni$ is in the $+2$ oxidation state ($3d^8$ configuration). $Cl^-$ is a weak field ligand,so it does not cause pairing. I

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$[NiCl_4]^{2-}$ - Tetrahedral - Paramagnetic

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(A) $1$. For $[NiCl_4]^{2-}$,$Ni$ is in the $+2$ oxidation state ($3d^8$ configuration). $Cl^-$ is a weak field ligand,so it does not cause pairing. It undergoes $sp^3$ hybridization,resulting in a tetrahedral geometry with $2$ unpaired electrons,making it paramagnetic. Thus,option $A$ is correct.$2$. For $[Ni(CO)_4]$,$Ni$ is in the $0$ oxidation state $(3d^8 4s^2)$. $CO$ is a strong field ligand,causing pairing of electrons. It undergoes $sp^3$ hybridization,resulting in a tetrahedral geometry with $0$ unpaired electrons,making it diamagnetic.$3$. For $[Ni(CN)_4]^{2-}$,$Ni$ is in the $+2$ oxidation state $(3d^8)$. $CN^-$ is a strong field ligand,causing pairing. It undergoes $dsp^2$ hybridization,resulting in a square planar geometry with $0$ unpaired electrons,making it diamagnetic.

Identify the correctly matched set from the following:

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