MCQ
Diamagnetic Lanthanoid ions are:
- A$\mathrm{Nd}^{3+}$ and $\mathrm{Eu}^{3+}$
- ✓$\mathrm{La}^{3+}$ and $\mathrm{Ce}^{4+}$
- C$\mathrm{Nd}^{3+}$ and $\mathrm{Ce}^{4+}$
- D$\mathrm{Lu}^{3+}$ and $\mathrm{Eu}^{3+}$
✓
Answer
Correct option: B.
$\mathrm{La}^{3+}$ and $\mathrm{Ce}^{4+}$
b
$\mathrm{Ce}:[\mathrm{Xe}] 4 \mathrm{f}^1 5 \mathrm{~d}^1 6 \mathrm{~s}^2 ; \mathrm{Ce}^{4+}$ diamagnetic
$\mathrm{Ce}:[\mathrm{Xe}] 4 \mathrm{f}^1 5 \mathrm{~d}^1 6 \mathrm{~s}^2 ; \mathrm{Ce}^{4+}$ diamagnetic
$\mathrm{La}:[\mathrm{Xe}] 4 \mathrm{f}^0 5 \mathrm{~d}^1 6 \mathrm{~s}^2 ; \mathrm{La}^{3+}$ diamagnetic
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