Match lanthanides in Column I with their properties in Column II
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
Correct match is
(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).