NEET2026ChemistryChapterActual
Match List I with List II regarding the magnetic properties of lanthanoid ions: List I List II A Pr ³⁺ 1 Diamagnetic B Sm ³⁺ 2 2 unpaired electrons C Gd ³⁺ 3 5 unpaired electrons D Lu ³⁺ 4 7 unpaired electrons Choose the correct answer from the options given below:
Options
- AA-4, B-3, C-2, D-1
- BA-2, B-3, C-4, D-1
- CA-2, B-4, C-3, D-1
- DA-3, B-2, C-4, D-1
Correct answer
B. A-2, B-3, C-4, D-1
Step-by-step solution
The electronic configurations of the given lanthanoid ions are: Pr ³⁺ ( Z=59 ): [ Xe ] 4f² 2 unpaired electrons. Sm ³⁺ ( Z=62 ): [ Xe ] 4f⁵ 5 unpaired electrons. Gd ³⁺ ( Z=64 ): [ Xe ] 4f⁷ 7 unpaired electrons. Lu ³⁺ ( Z=71 ): [ Xe ] 4f¹⁴ 0 unpaired electrons (Diamagnetic). Thus, the correct matching is A-2, B-3, C-4, D-1. Answer: A-2, B-3, C-4, D-1