Which of the following fluorides is soluble in water?

Options

A. `SrF_(2)`
B. `CaF_`
C. `MgF_(2)`
D. `BeF_(2)`

Answer

4

Explanation

The common fluorides `(F^(-))` are soluble in water except `MgF_(2), CaF_(2), SrF_(2), BaF_(2), PbF_(2)`.
Beryllium fluoride (a predominantly convent compound) is very soluble in water, owing to the high solvation energy of Be in forming `[Be(H_(2)O)_(4)]^(2+)`. The other group 2 flourides `MF_(2)` are all insoluble.