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Nickel (Z=28) combines with a uninegativ...

Nickel `(Z=28)` combines with a uninegative monodentate ligand `X^(-)` to form a paramagnetic complex `[NiX_4]^(2-)`. The number of unpaired electron(s) in the nickel and geometry of this complex ion are, respectively:

A

One, tetrahedral

B

Two, tetrahedral

C

One, square planar

D

Two, square planar

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The correct Answer is:
B
Properties of ionic solid
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