MCQ
The general electronic configuration of transition elements is
- A$(n - 1){d^{1 - 5}}$
- B$(n - 1){d^{1 - 10}}n{s^1}$
- ✓$(n - 1){d^{1 - 10}}n{s^{1 - 2}}$
- D$n{s^2}(n - 1){d^{10}}$
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$(I)\, Co(III)$ 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.