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Which of the following are paramagnetic...

Which of the following are paramagnetic

A

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

B

`[Ni(NH_(3))_(4)]^(2+)`

C

`[MnCl_(4)]^(2-)`

D

`[CuCl_(4)]^(2-)`

Text Solution

Verified by Experts

The correct Answer is:
A, B, C, D
The number of unpaired electrons in these complexes are respectively.
`{:([NiCl_(4)]^(2-)," "2),([Ni(CN)_(4)]," "0),([MnCl_(4)]^(2-)," "5),([CuCl_(4)]^(2-)," "1):}`
`CN^(-)` a string field ligand and `Cl^(-)` is a weak field ligand. So only in `[Ni(CN)_(4)]^(2-)` electronic regrouping occurs.
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