NTA Abhyas JEE Main2020ChemistryCoordination CompoundsPractice
Select the correct statement among the following.
Options
- ACo (III) is stabilised in presence of weak field ligands, while Co (II) is stabilised in presence of strong fi
- BFour coordinated complexes of Pd (II) and Pt (II) are paramagnetic and square planar.
- C[Ni(CN) 4 ] 4- ion and [Ni(CO) 4 ] are tetrahedral and square planar respectively.
- DNi 2+ ion does not form inner orbital octahedral complexes in presence of weak ligand fields.
Correct answer
D. Ni 2+ ion does not form inner orbital octahedral complexes in presence of weak ligand fields.
Step-by-step solution
This problem includes conceptual mixing of CFSE, CFT and magnetism in coordination compounds. This problem can be solved by usual understanding of each statement as explained below : (I) Both Co 2+ and Co 3+ are stabilised in presence of strong of field ligands due to high CFSE values. (II) Due to higher Zeft values on the valence shell Pd 2+ and Pt 2+ cations, they always form inner orbital complexes but are diamagnetic in nature and square planar. (III) [Ni(CO) 4 ]; sp 3 , tetrahedral, μ = 0 BM [Ni(CN) 4 ] 4- ; d