In this lesson our instructor talks about intermolecular forces and liquids. First, he discusses intermolecular forces of polar molecules and intermolecular of nonpolar molecules. Then he talks about properties of liquids. He ends the lesson with a summary and two helpful sample problems. Intermolecular Forces & Liquids The main types of IMF are ion-induced dipole, dispersion, dipole-dipole, and hydrogen bonding. IMF can exert strong influence on a liquid’s physical properties, such as boiling point and vapor pressure. By using IMF, we can make a strong educated guess of the relative volatility of a liquid.