Q44 · CSIR NET Chemistry, December 2017
Paper: CSIR NET December 2017 · Subject: Inorganic Chemistry · Chapter: Lanthanides and Actinides · Topic: Lanthanides & Actinides – General · Marks: 2 · Difficulty: Easy
Match lanthanides in Column I with their properties in Column II
Correct match is
| Column I | Column II |
|---|---|
| A. Lu | (i) Reagent in oxidation state IV |
| B. Eu | (ii) Ml, of metallic lustre |
| C. Ce | (iii) Diamagnetic M(III) |
| D. Tb | (iv) Pink in oxidation state III |
(a)A-(iii), B-(ii); C-(i); D-(iv)
(b)A-(ii), B-(iii); C-(iv); D-(i)
(c)A-(iv), B-(ii); C-(i); D-(iii)
(d)A-(iii), B-(ii); C-(iv); D-(i)
Answer
Answer: A ✓ checked by 4AB · confidence medium
Explanation
Lu³⁺ (f¹⁴) is the diamagnetic M(III) ion. Ce(IV) is used as a reagent (ceric ammonium nitrate). Tb³⁺ is pale pink. The remaining LnI₂ with metallic lustre is assigned to Eu in the key (a).
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