Question

$Be{F}_2$ is soluble in water, whereas the fluorides of other alkaline earth metals are insoluble because of:

• A. greater hydration energy of $B{e}^{2+}$ ion as compared to crystal lattice
• B. covalent nature of $Be{F}_2$
• C. ionic nature of $Be{F}_2$
• D. none of these

Answer 1

Answer: (A)

greater hydration energy of $B{e}^{2+}$ ion as compared to crystal lattice

Option $\left(A\right)$ is correct.

$Be{F}_2$ is soluble in water due to greater hydration energy of $B{e}^{2+}$ ion as compared to the crystal lattice.The other fluorides are

almost insoluble in water. Since on descending the group lattice energy decreases more rapidly than the hydration energy.