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Which of the following is not correct ?...

Which of the following is not correct ?

A

`[Fe(CN)_6]^(3-)` is weakly paramagnetic

B

`[Fe(CN)_6]^(4-)` is strongly paramagnetic.

C

`[Ni(CN)_4]^(2-)` is diamagnetic

D

`[NiCl_4]^(2-)` is diamagnetic.

Text Solution

Verified by Experts

The correct Answer is:
B
The complex `[Fe(CN)_6]^(4-)` involves `d^(2)sp(3)`, hybridisation (inner orbital complex) . Since `CN^(-)` ions are strong field ligands, electron pairing occurs & the complex is diamagnetic in nature.
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