JEE Advanced2025Chemistryd and f Block ElementsActual
The pair(s) of diamagnetic ions is(are)
Options
- ALa ³⁺, Ce ⁴⁺
- BYb ²⁺, Lu ³⁺
- CLa ²⁺, Ce ³⁺
- DYb ³⁺, Lu ²⁺
Correct answer
A. La ³⁺, Ce ⁴⁺
Step-by-step solution
aligned La ⁺³ [ ₅₄ Xe ] 4 f ^0 & -diamagnetic Yb ⁺² [ ₅₄ Xe ] 4 f ¹⁴ & -diamagnetic Lu ⁺³ [ ₅₄ Xe ] 4 f ¹⁴ & -diamagnetic La ⁺² [ ₅₄ Xe ] 5 ~d ^1 & -paramagnetic Ce ⁺⁴ [ ₅₄ Xe ] 4 f ^0 & -diamagnetic Ce ⁺³ [ ₅₄ Xe ] 4 f ^1 & -paramagnetic Yb ⁺³ [ ₅₄ Xe ] 4 f ¹³ & -paramagnetic Lu ⁺² [ ₅₄ Xe ] 4 f ¹⁴ 5 ~d ^1 & -paramagnetic aligned