A) \[L{{a}^{3+}}\]
B) \[L{{u}^{3+}}\]
C) \[N{{d}^{3+}}\]
D) All lanthanides show paramagnetic
Correct Answer: C
Solution :
\[N{{d}^{3+}}\xrightarrow{{}}\] paramagnetic Paramagnetism is shown by the positive ions of lanthanides excepts \[L{{a}^{3+}}(4f{}^\circ )\] and \[L{{u}^{3+}}(4f{}^\circ ).\] These ions are diamagnetic in nature. \[N{{d}^{3+}}(4{{f}^{3}})\]has 3 unpaired electrons, therefore it is paramagnetic.
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