Chemistry · Chemical Bonding

JEE Advanced 2025 — Paper 2 — Question 35

The correct statements (s) about intermolecular forces is(are)

Option A:
The potential energy between two point charges approaches zero more rapidly than the potential energy between a point dipole and a point charge as the distance between them approaches infinity
Option B:
The average potential energy of two rotating polar molecules that are separated by a distance $r$ has $1 / r^{3}$ dependence
Option C:
The dipole-induced dipole average interaction energy is independent of temperature
Correct
Option D:
Nonpolar molecules attract one another even though neither has a permanent dipole moment
Correct

Answer: C, D

(i) Ion - Ion $\rightarrow$ Interaction energy $\propto \frac{1}{\mathrm{r}}$

Ion - dipole $\rightarrow$ Interaction energy $\propto \frac{1}{\mathrm{r}^{2}}$

Ion - dipole Interaction energy approaches zero more rapidly as ' $r$ ' increases

(ii) Rotating Polar molecules $\rightarrow$ Interaction energy $\propto \frac{1}{\mathrm{r}^{6}}$ .

(iii) Dipole - induced dipole forces are independent of temperature.

(iv) Non-polar species show London dispersion forces

Answer key and solution verified before publishing.

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