JEE Mains · Chemistry · STD 12 - 4. d and f- block elements
Diamagnetic Lanthanoid ions are _______.
- A \(\mathrm{Nd}^{3+}\) and \(\mathrm{Eu}^{3+}\)
- B \(\mathrm{La}^{3+}\) and \(\mathrm{Ce}^{4+}\)
- C \(\mathrm{Nd}^{3+}\) and \(\mathrm{Ce}^{4+}\)
- D \(\mathrm{Lu}^{3+}\) and \(\mathrm{Eu}^{3+}\)
Answer & Solution
Correct Answer
(B) \(\mathrm{La}^{3+}\) and \(\mathrm{Ce}^{4+}\)
Step-by-step Solution
Detailed explanation
\(\mathrm{Ce}:[\mathrm{Xe}] 4 \mathrm{f}^1 5 \mathrm{~d}^1 6 \mathrm{~s}^2 ; \mathrm{Ce}^{4+}\) 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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