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Among the complexes of Ni listed below, ...

Among the complexes of Ni listed below, the following is the only correct statement :
`I-[Ni(CO)_(4)]`
`II-[Ni(CN)_(4)]^(2-)`
`III-[Ni(Cl_(4))]^(2-)`

A

All of them have tetrahedral geometry

B

I and III are tetrahedral and II has square planar geometry

C

I and II are tetrahedral and III is square planar

D

All of them have square planar geometry.

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The correct Answer is:
B
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Amongst Ni(CO)_(4), [Ni(CN)_(4)]^(2-) and [NiCl_(4)]^(2-) :

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State reason for the following The molecular shape of Ni(CO)_4 is not the same as that of [Ni(CN)_4]^(2-) .

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