question_answer

In\[{{[NiC{{l}_{4}}]}^{2-}},\]the number of unpaired electrons, are:

A)  4                                            

B)  2

C)  3                                            

D)  5

Correct Answer: B

Solution :

                 Oxidation number of Ni in \[{{[NiC{{l}_{4}}]}^{2-}}=+2\] \[\therefore \]Number of unpaired electrons = 2