In ethanol CH3CH2OH , there are three types of intermolecular forces present:1. Hydrogen bonding: This is the strongest intermolecular force present in ethanol. It occurs between the hydrogen atom of the hydroxyl group OH in one ethanol molecule and the oxygen atom of the hydroxyl group in another ethanol molecule.2. Dipole-dipole interactions: Ethanol is a polar molecule due to the electronegativity difference between oxygen and hydrogen in the hydroxyl group, as well as between carbon and hydrogen in the alkyl group. This results in a net dipole moment, leading to dipole-dipole interactions between ethanol molecules.3. London dispersion forces: These are weak, temporary attractive forces that exist between all molecules, including nonpolar ones. They arise due to the temporary fluctuations in electron distribution around the molecules, which create temporary dipoles. In ethanol, London dispersion forces are present between the alkyl CH3CH2 groups of neighboring molecules.