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Question
Mention the number of unpaired electrons and geometry of the following complex:
\[\ce{[Ni(Cl)4]^{2-}}\]
Solution
The complex \[\ce{[Ni(Cl)4]^{2-}}\] has oxidation state of \[\ce{Ni}\] is +2, valence shell electronic configuration of \[\ce{Ni^{2+}}\] is
The complex has two unpaired electrons; hence, it is paramagnetic. Complex is tetrahedral.
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