Question

The intermolecular force that is inversely proportional to $r^6$ among the following:
(Where r is the distance between the two atoms)

• A. London force
• B. Dipole - dipole interaction
• C. Ion - dipole interaction
• D. Ion - ion interaction

Answer 1

The correct option is A London force

London force $\propto \frac{1}{r^6}$
dipole - dipole interaction $\propto \frac{1}{r^3}$
ion- ion interaction $\propto \frac{1}{r^2}$
ion - dipole interaction $\propto \frac{1}{r^2}$