Given below are the pairs of group 13 elements showing their relation in terms of atomic radius. (B — JEE Mains Chemistry Past Papers Chemistry Question

Question

Given below are the pairs of group 13 elements showing their relation in terms of atomic radius. (B < Al), (Al < Ga), (Ga < In) and (In < TI) Identify the elements present in the incorrect pair and in that pair find out the element (X) that has higher ionic radius (M3i than the other one. The atomic number of the element (X) is (A) 31 (B) 13 (C) 81 (D) 49