Question

What would be observed when the boiling point of chlorine is lower than that of iodine

Answer 1

If the boiling point of chlorine is lower than that of iodine, it means that chlorine molecules have weaker intermolecular forces of attraction than iodine molecules. As a result, the chlorine molecules would require less energy to break the bonds between them and transition from a liquid to a gas. Consequently, when the two elements are heated in a container, the chlorine would boil off and evaporate first, followed by the iodine at a higher temperature. Therefore, the observed phenomenon would be that chlorine would boil and evaporate before iodine does.