Why is the boiling point of hydrofluoric acid abnormally high?

If PK_b for fluoride ion at 25^@C is 10.83. predict the ionisation constant of hydrofluoric acid in water at this temperature.

Why is the boiling point of a solution always higher than that of a pure solvent ?

Which have high boiling points:

Why is boiling point of HF abnormally high ?

How does hydrofluoric acid react with sand ?

Highest boiling point is found in –