AIPMT PRELIMS2003Chemistry-Periodic Table
AIPMT PRELIMS 2003 Chemistry Lanthanides MCQ Question
Type: MCQ-conceptual-Medium-Class 12
The correct order of ionic radii of Y³⁺, La³⁺, Eu³⁺, and Lu³⁺ is:
A
Y³⁺ < La³⁺ < Eu³⁺ < Lu³⁺
B
Y³⁺ < Lu³⁺ < Eu³⁺ < La³⁺
C
Lu³⁺ < Eu³⁺ < La³⁺ < Y³⁺
D
La³⁺ < Eu³⁺ < Lu³⁺ < Y³⁺
Correct Answer
Option B
Detailed Explanation
The ionic radii decrease across the lanthanide series due to the lanthanide contraction.
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