Which of the following statements is not correct?

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The lattice energy of salts of alkaline earth metals decreases with increase in ionic sizes from ${Be}^{2 +}$ to ${Ba}^{2 +}$

The hydration energies of ions of alkaline earth metals decrease regularly from ${Be}^{2 +}$ to ${Ba}^{2 +}$

The salts of alkaline earth metals are less hydrated than those of alkali metals.

Carbonates of alkaline earth metals are insoluble in water.

answer is C.

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Detailed Solution

The size of alkaline earth metal ions is lower than the size of alkali metal ions. The lower the size of the cation, the higher is the hydration energy. So the salts of alkaline earth metals have more water molecules of crystallization than those of alkali metals.

The salts of alkaline earth metals are more hydrated because of+2 charge ofthe ions.

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