1. The problem statement, all variables and given/known data Intermolecular forces are 1- Attractive only 2-Repulsive only 3-Long-range 4-Short-range 2. Relevant equations The 1st and 2nd options are not valid as the nature depends on the distance between the molecules. 3. The attempt at a solution The answer given is short-range.How is that?Even,at infinity,the force does not become zero as even then,attractive forces should act.Or is it so,because intermolecular distances are measured on a very small scale and therefore,they are not valid for long distances?