Q49 · CSIR NET Chemistry, June 2013
Paper: CSIR NET June 2013 · Subject: Inorganic Chemistry · Chapter: Lanthanides and Actinides · Topic: Lanthanides & Actinides – General · Marks: 2 · Difficulty: Easy
Consider following lanthanide (III) ions
\[ \begin{array}{l} \text{(A) Nd(III)} \\ \text{(B) Gd(III)} \\ \text{(C) Dy(III)} \end{array} \]
The magnetic moment closest to the spin only value is(are) for(a)B only
(b)A and B only
(c)A and C only
(d)B and C only
Answer
Answer: A ✓ checked by 4AB · confidence high
Explanation
Gd³⁺ is f⁷ with L = 0, so its moment (≈ 7.94 BM) equals the spin-only value. Nd³⁺ and Dy³⁺ have large orbital contributions. B only (a).
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