Which of the following statement is/are ...

Which of the following statement is/are correct ?

`Ni(CO)_(4)`_____Tetrahedral, paramagnetic

`Ni(CN)_(4)]^(2-)`_____ Square planar, diamagnetic

`Ni(dmg)_(2)`_____ Square planar, diamagnetic

`[NiCl_(4)]^(2-)`______ Tetrahedral, paramagnetic

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The correct Answer is:

B, C, D

In complex nickel is in zero oxidation state. The CO is strong field ligand and therefore compels for the pairing of electrons. The hybridisation scheme is as shown in figure.

It is tetrahedral and as all electrons are paired so diamagnetic.

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Which of the following statement is/are correct ?

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