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JEE Main 2025 Chemistry question

ChemistryClassification of Elements and Periodicity in PropertiesJEE Main 2025

Given below are the pairs of group 13 elements showing their relation in terms of atomic radius. (B < Al), (Al < Ga), (Ga < ln) and (ln < Tl). Identify the elements present in the incorrect pair and in that pair find out the element (X) that has higher ionic radius (M³⁺) than the other one. The atomic number of the element (X) is

Answer: (1)

Solution

Correct order is B<Ga<Al<In≈Tl. Incorrect pair is (Al<Ga). Ga³⁺ has higher ionic radius than Al³⁺. X=Ga, atomic number 31

Question ID VK-002773