Ionic compounds like $AgCl, {CaF}_{2}$ and ${BaSO}_{4}$ are insoluble in water. This is because,

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ionic compounds are insoluble in water

water is not a good solvent with ionising ability

these molecules have high lattice energy than hydration energy.

the dielectric constant of water is very high

answer is D.

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Detailed Solution

Given data: It is given that the Ionic compounds like $AgCl, {CaF}_{2}$ and ${BaSO}_{4}$ are insoluble in water.

Explanation:

A number of ionic compounds, e.g AgCl, ${CaF}_{2}, {BaSO}_{4}$ are insoluble in water. This is because these molecules have exceptionally high attractive forces in their lattice. Ionic compounds having lattice energy higher than hydration energy are insoluble in water. Ionic compounds having lattice energy lesser than hydration energy are soluble in water.

Hence, the correct option is option (D) these molecules have high lattice energy than hydration energy.

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