1.

In which of the following complex ion, the central metal ion is in a state of sp^(3)d^(2) hybridisation ?

Answer»

`[CoF_(6)]^(3-)`
`[Co(NH_(3))_(6)]^(3+)`
`[FE(CN)_(6)]^(3-)`
`[Cr(NH_(3))_(6)]^(3+)`

Solution :Electronic configurations of :

`F^(-)`, being a weak LIGAND cannot cause forcible PAIRING of ELECTRONS within d subshell and forms outer orbital octahedral complex.
`[Co(NH_(3))_(6)]^(3+)` ion :

`NH_(3)` and `CN^(-)` are strong ligands, so they form inner orbital octahedral complex.


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