Question

Dispersion force’s interaction energy is proportional to (take “r” as the distance between the two particles)  ___________

(a) r^6

(b) 1/r^-6

(c) r^2

(d) 1/r^6

This question was addressed to me during an internship interview.

This question is from States of Matter in section States of Matter of Chemistry – Class 11

Answer 1

Correct choice is (d) 1/r^6

The explanation: The interaction energy between two atoms or molecules experiencing dispersion or London forces is inversely proportional to the sixth power of the distance between those molecules when found, experimentally.