A) \[C{{o}^{2+}}\]
B) \[N{{i}^{2+}}\]
C) \[C{{u}^{2+}}\]
D) \[Z{{n}^{2+}}\]
Correct Answer: D
Solution :
\[Z{{n}^{2+}}\] has \[{{d}^{10}}\]configuration, where all the electrons are paired and is diamagnetic. All other ions are paramagnetic.
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