Chemistry · d and f Block Elements

JEE Advanced 2025 — Paper 1 — Question 36

The pair(s) of diamagnetic ions is(are)

Answer: A, B

$\quad \mathrm{La}^{+3} \rightarrow\left[{ }_{54} \mathrm{Xe}\right] 4 \mathrm{f}^{0}$ diamagnetic

$\mathrm{Yb}^{+2} \rightarrow\left[{ }_{54} \mathrm{Xe}\right] 4 \mathrm{f}^{14}$ diamagnetic

$\mathrm{Lu}^{+3} \rightarrow\left[{ }_{54} \mathrm{Xe}\right] 4 \mathrm{f}^{14}$ diamagnetic

$\mathrm{La}^{+2} \rightarrow\left[{ }_{54} \mathrm{Xe}\right] 5 \mathrm{~d}^{1} \quad$ paramagnetic

$\mathrm{Ce}^{+4} \rightarrow\left[{ }_{54} \mathrm{Xe}\right] 4 \mathrm{f}^{0} \quad$ diamagnetic

$\mathrm{Ce}^{+3} \rightarrow\left[{ }_{54} \mathrm{Xe}\right] 4 \mathrm{f}^{1} \quad$ paramagnetic

$\mathrm{Yb}^{+3} \rightarrow\left[{ }_{54} \mathrm{Xe}\right] 4 \mathrm{f}^{13} \quad$ paramagnetic

$\mathrm{Lu}^{+2} \rightarrow\left[{ }_{54} \mathrm{Xe}\right] 4 \mathrm{f}^{14} 5 \mathrm{~d}^{1} \quad$ paramagnetic

Answer key and solution verified before publishing.

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