21)
It means that no heat is absorbed or evolved when the components
are mixed Also, the volume of solution would be equal to the sum of
volumes of the two components At molecular level, ideal behaviour of
the solutions can be explained by considering two components A and
B 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