10. Biomolecules — Chemistry STD 12 Science — Question

$Cu^{+2} + 2e^-\to Cu$ ; $E^o = X_2$ then the value of $E^o$ for $Cu^{+2} + e^-\to Cu^+$ will be

$(I)\, Co(III)$ is stabilised in presence of weak field ligands, while $Co(II)$ is  stabilised in presence of strong field ligand. 

$(II)$ Four coordinated complexes of $Pd(II)$ and $Pt(II)$ are diamagnetic and  square planar.

$(III)\,[Ni (CN)_4]^{4-}$ ion and $[Ni (CO)_4]$ are diamagnetic tetrahedral and  square planar respectively. 

$(IV)\,Ni^{2+}$ ion does not form inner orbital octahedral complexes.