$Ni{\left( {CO} \right)_4},$ ${\left[ {Ni{{(CN)}_4}} \right]^{2 - }}$ અને ${[NiC{l_4}]^{2 - }}$માં

Question

A$Ni{\left( {CO} \right)_4}$ અને ${\left[ {NiC{l_4}} \right]^{2 - }}$ ડાયમેગ્નેટીક છે અને ${[Ni{(CN)_4}]^{2 - }}$ અનુચુંબકીય છે.
B${\left[ {NiC{l_4}} \right]^{2 - }}$ અને ${\left[ {Ni{{\left( {CN} \right)}_4}} \right]^{2 - }}$ ડાયમેગ્નેટીક છે અને $Ni{\left( {CO} \right)_4}$ અનુચુંબકીય છે.
C$Ni{\left( {CO} \right)_4}$ અને ${\left[ {Ni{{\left( {CN} \right)}_4}} \right]^{2 - }}$ ડાયમેગ્નેટીક છે અને ${\left[ {NiC{l_4}} \right]^{2 - }}$ અનુચુંબકીય છે.
D$Ni{\left( {CO} \right)_4}$ ડાયમેગ્નેટીક છે અને ${\left[ {NiC{l_4}} \right]^{2 - }}$ અને ${\left[ {Ni{{\left( {CN} \right)}_4}} \right]^{2 - }}$ અનુચુંબકીય છે.

IIT 1991, Diffcult

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Solution

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.

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