Question

Nickel (Z = 28) combines with a uninegative monodentate ligand X^– to form a paramagnetic complex [NiX₄]^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.

Answer 1

Correct option(b) two, tetrahedral

Explanation:

Nickel has two unpaired electrons and geometry is tetrahedral due to sp³ hybridisation.