Q.

The geometry and magnetic behaviour of the complex Ni(CO)4 are

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a

square planar geometry and diamagnetic

b

tetrahedral geometry and diamagnetic

c

square planar geometry and paramagnetic

d

tetrahedral geometry and paramagnetic.

answer is B.

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Detailed Solution

Ni(28):[Ar]3d84s2∵  CO is a strong field ligand, so, unpaired electrons get paired   Thus, the complex is sp3 hybridised with tetrahedral geometry and diamagnetic in nature.
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