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QNEET-2024-Ch-24: NEET 2024 Chemistry - Class 12 NEET-2024-Ch-24 Solution: The pair of lanthanoid ions which are diamagnetic is…

The pair of lanthanoid ions which are diamagnetic is

Ce^{4+}

and

Yb^{2+}

Ce^{3+}

and

Eu^{2+}

Gd^{3+}

and

Eu^{3+}

Pm^{3+}

and

Sm^{3+}

Step-by-Step Verified Solution

Magnetic moment _ = n ( n + 2 ) n _ number of unpaired electron Hence Ce 4 + and Yb 2 + are only diamagnetic.