Question

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

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

Answer 1

Answer: (E)

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 of the molecule under consideration)