In pure components, the intermolecular attractive interactions will
be of types A-A and B-B, whereas in the binary solutions in addition
to these two interactions, A-B type of interactions will also be present If the intermolecular attractive forces between the A-A and B-B are
nearly equal to those between A-B, this leads to the formation of ideal
solution A perfectly ideal solution is rare but some solutions are nearly
ideal in behaviour Solution of n-hexane and n-heptane, bromoethane
and chloroethane, benzene and toluene, etc