Which of the following has diamagnetic charac | vedclass

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(D) To determine the magnetic character,we look at the electronic configuration of the central metal ion in the presence of the ligand:$A$. $[NiCl_4]^

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

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(D) To determine the magnetic character,we look at the electronic configuration of the central metal ion in the presence of the ligand:$A$. $[NiCl_4]^{2-}$: $Ni^{2+}$ $(3d^8)$. $Cl^-$ is a weak field ligand,so it does not cause pairing. It has $2$ unpaired electrons,making it paramagnetic.$B$. $[CoF_6]^{3-}$: $Co^{3+}$ $(3d^6)$. $F^-$ is a weak field ligand. It has $4$ unpaired electrons,making it paramagnetic.$C$. $[Fe(H_2O)_6]^{2+}$: $Fe^{2+}$ $(3d^6)$. $H_2O$ is a weak field ligand. It has $4$ unpaired electrons,making it paramagnetic.$D$. $[Ni(CN)_4]^{2-}$: $Ni^{2+}$ $(3d^8)$. $CN^-$ is a strong field ligand,which causes the pairing of electrons in the $3d$ orbitals. The configuration becomes $3d^{10}$ (all paired). Thus,it is diamagnetic.

Which of the following has diamagnetic character?

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