A) \[{{\left[ Ni{{\left( {{H}_{2}}O \right)}_{6}} \right]}^{2+}}\]
B) \[\left[ Ni{{\left( CO \right)}_{4}} \right]\]
C) \[{{\left[ Zn{{\left( N{{H}_{3}} \right)}_{4}} \right]}^{2+}}\]
D) \[{{\left[ Co{{\left( N{{H}_{3}} \right)}_{6}} \right]}^{+3}}\]
Correct Answer: A
Solution :
The configuration of \[N{{i}^{2+}}\]has two unpaired electron so it is paramagnetic.
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