Dipole-dipole interaction energy between polar molecules in solids depends on the radius of the molecule (r) and it is directly proportional to

Options

A. `(1 //r^2)`
B. `(1//r^6)`
C. `(1//r)`
D. `(1//r^3)`

Answer

D

Explanation

Dipole-dipole interaction energy between stationary polar molecules (as present in the solids) is proportional to `1//r^3` .