TS EAMCET 19-July-2022 Shift 1 Solved Paper

Out of all given metal halides, the order of size of cation is
Mg2+<Ca2+<Sr2+<Ba2+
The hydration of cation is indirectly proportional to the size of the cation. Hence, MgCl2. molecule/salt can accomodate more number of water molecules per molecule in their halide hydrates.