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Question

In [CoF6]3,Co3+ uses outer d orbits (4d) in sp3d2 hybridization. The number of unpaired electrons present in complex ion is :

A
0
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B
4
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C
2
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D
3
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Solution

The correct option is B 4
As the Co3+ has configuration as follows: 3d64s0 ,
Now, as the F is the weak field ligand, so it does not cause the paring of the 3d6 electrons and it has 1 paired electrons and 4 unpaired electrons in 3d orbitals.

In [CoF6]3,Co3+ uses outer d orbitals (4d) in sp3d2 hybridization. The number of unpaired electrons present in complex ion is 4.

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