2) The vapor pressure of liquid A is lower than that of liquid B at room temperature, also lower at 60 C. Which of the following statements concerning about the liquids A and B is always true? A) Both liquids A and B much exhibit hydrogen bonding B) Both liquids A and B much have ion-induced dipole interactions. C) Both liquids A and B much bave ion-dipole forces D) Both liquids A and B much have London forces E) Both liquids A and B much have dipole-dipole forces. Solution Factors that affect vapor pressure are:- 1) Temperature: At a higher temperature more molecules have enough energy to escape out from the liquid. At a lower temperature, fewer molecules have sufficient energy to escape from liquid. 2) Types of Molecules:- The types of Molecules that make up a liquid or a solid determine it\'s vapor pressure. If the intermolecular forces between molecules are: * relatively strong, the vapor pressure will be relatively low. * relatively weak, the vapor pressure will be relatively high. So the answer will be option (C) as ion-dipole are stronger in the given case. NOTE: If the question is multiple correct anwer then option may be (A), (B), (C) also. .