TS EAMCET 19-July-2022 Shift 1 Solved Paper

On moving down the group, size of ion increases thus, Y3+ is smallest in size than La3+, Lu3+ and Eu3+.
On moving left to right in lanthanoids, size of cation decreases because of lanthanoid
contraction. Hence, the correct order of ionic radii is ˙Y3+<Lu3+<Eu3+<La3+.