A) 4
B) 2
C) 3
D) 5
Correct Answer: C
Solution :
In \[{{[NiC{{l}_{4}}]}^{2-}}\] the oxidation number of Ni is +2. Electronic configuration of Ni (at 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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