JEE Main 2003 — S Block Elements Question with Solution

As we move down the group, the lattice energies of carbonates remain approximately the same. However the hydration energies of the metal cation decreases from $$B{e}^{++}$$ to $$B{a}^{++},$$ hence the solubilities of carbonates of the alkaline earth metal decreases down the group mainly due to decreasing hydration energies of the cations from $$B{e}^{++}$$ to $$B{a}^{++}.$$