Question

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

• A. $\left(1/r^2\right)$
• B. $\left(1/r^6\right)$
• C. $\left(1/r\right)$
• D. $\left(1/r^5\right)$
• E. $\left(1/r^3\right)$

Answer 1

The correct option is E $\left(1/r^3\right)$

Dipole-dipole interaction energy between polar molecules in solids depends on the distance between them as per following relation:
Dipole-dipole interaction energy $\propto \frac{1}{r^3}$
($r=$ radius on the molecule under consideration)