Question

Dipole-dipole interaction energy between polar molecules in solids depends on radius r and is directly proportional to

• A. $\frac{1}{r^2}$
• B. $\frac{1}{r^6}$
• C. $\frac{1}{r}$
• D. $\frac{1}{r^3}$
• E. $\frac{1}{r^3}$

Hint:

Dipole-dipole ∝ 1/r$^3$, dispersion ∝ 1/r$^6$.

Answer 1

The Correct Option is D