MCQ
Incorrect statement regarding rusting is
- AMetallic iron is oxidised to $F{e^{3 + }}$ions
- ✓Metallic iron is reduced to $F{e^{2 - }}$ ions
- COxygen gas is reduced to oxide ion
- DYellowish -brown product is formed
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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.