An example of this type is a mixture of phenol and aniline In this case the intermolecular hydrogen bonding between phenolic
proton and lone pair on nitrogen atom of aniline is stronger than the
respective intermolecular hydrogen bonding between similar
molecules Similarly, a mixture of chloroform and acetone
forms a solution with negative deviation from Raoult’s law This is because chloroform molecule is able to form hydrogen
bond with acetone molecule as shown