1.

Amongst Ni(CO)_(4), [Ni(CN)_(4)]^(2-) and [NiCl_(4)]^(2-) :

Answer»

`Ni(CO)_(4) and NiCl_(4)^(2-)` are diamagnetic and `[Ni(CN)_(4)]^(2-)`is PARAMAGNETIC.
`NiCl_(4)^(2-) and [Ni(CN)_(4)]^(2-)` are diamagneticand `Ni(CO)_(4)` is paramagnetic.
`Ni(CO)_(4) and [Ni(CN)_(4)]^(2-)` are diamagnetic and `NiCl_(4)^(2-)` is paramagnetic.
`Ni(CO)_(4)` is diamagnetic and `NiCl_(4)^(2-)` and `[Ni(CN)_(4)]^(2-)` are diamagnetic.

Answer :C


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