Which of the following has the highest lattice energy ?

Options

A. NaF
B. `MgF_(2)`
C. `AlF_(3)`
D. `CaF_(2)`

Answer

C

Explanation

`L.E. alpha (q_(1)q_(1))/(r^(2)), Al^(3+)` ion has maximum positive charge, hence `AlF_(3)` has maximum L.E.