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Amongst [NiCl(4)]^(2-),[Ni(H(2)O)(6)]^(2...

Amongst `[NiCl_(4)]^(2-),[Ni(H_(2)O)_(6)]^(2+), [Ni(PPh_(3))_(2)Cl_(2)], [Ni(CO)_(4)]&[Ni(CN)_(4)]^(2-)`, paramagnetic species are -

A

`[NiCl_(4)]^(2-), [Ni(H_(2)O)_(6)]^(2+),[Ni(PPh_(3))_(2)Cl_(2)]`

B

`[Ni(CO)_(4)], [Ni(PPh_(3))_(2)Cl_(2)],[NiCl_(4)]^(2-)`

C

`[Ni(CN)_(4)]^(2-),[Ni(H_(2)O)_(6)]^(2+),[NiCl_(4)]^(2-)`

D

`[Ni(PPh_(3))_(2)Cl_(2)],[Ni(CO)_(4)],[Ni(CN)_(4)]^(2-)`

Text Solution

Verified by Experts

The correct Answer is:
A
The hybridisation states of `Ni^(2+)` in `[NiCl_(4)]^(2-),[Ni(H_(2)O)_(6)]^(2+) and [Ni(PPh_(3))_(2)Cl_(2)]` are `sp^(3),sp^(3)d^(2) and sp^(3)` respectively. Also in these three compounds, the number of unpaired electrons of `Ni^(2+)` is 2. Hence, these three compounds are paramagnetic.
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