c
(c) The electronic configuration of \(Ni\) in
\({[Ni{(CN)_4}]^{2 - }},\,{[Ni(C{l_4})]^{2 - }}\) and \(Ni{(CO)_4}\) are as following
\(CO\) and \(C{N^ - }\) are strong ligands so they induces pairing of electrons so their complexes are diamagnetic while \(C{l^ - }\) is a weak ligand so it does not induce the pairing of electrons so its complex is paramagnetic.
