A) 4
B) 2
C) 3
D) 5
Correct Answer: B
Solution :
In\[{{[NiC{{l}_{4}}]}^{2-}}\]the oxidation number of\[Ni\]is\[+2\]. Electronic configuration of\[Ni\] (Atomic no. =28) \[Ni=[Ar]\,3{{d}^{8}}4{{s}^{2}}\] \[N{{i}^{2+}}=[Ar]\,3{{d}^{8}}\] Or \[[Ar]\] It is evident that in\[{{[NiC{{l}_{4}}]}^{2-}}\]the number of unpaired electrons are two.You need to login to perform this action.
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