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Question
Choose the most correct option.
Which of the following sets of ions contain only paramagnetic ions?
Options
Sm3⊕, Ho3⊕, Lu3⊕
La3⊕, Ce3⊕, Sm3⊕
La3⊕, Eu3⊕, Gd3⊕
Ce3⊕, Eu3⊕, Yb3⊕
Solution
Ce3⊕, Eu3⊕, Yb3⊕
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