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V.B. Theory describes the bonding in ter...

V.B. Theory describes the bonding in terms of hybridised orbitals of central atom/ion. The theory mainly deals with the geometry (i.e. shape, magnetic properties)
Which complex has zero magnetic moment (spin only)

A

`(NiCl_(4))^(-2)`

B

`[Ni(CN)_(4)]^(2-)`

C

`[Cr(CN)_(6)]^(3+)`

D

All

Text Solution

Verified by Experts

The correct Answer is:
B
`Cl^(-)` : Weak field ligand.
`CN^(-)` : strong field ligand.
In `NiCl_(4)^(2-)` (No rearrangement)

2 unpaired electrons `implies` paramagnetic.
In `[Ni(CN)_(4)]^(2-)` (after regrouping )

No unpaired electrons `implies` diamagnetic.
In `[Cr(CN)_(6)]^(3-)`

3 unpaired electrons `implies` paramagnetic.
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