State Raoult’s law for a solution containing volatile components. Write two characteristics of the solution which obeys Raoult’s law at all concentrations.

For a solution containing volatile liquids, the partial pressure of each component in the solution is directly proportional to its mole fraction present in the solution.
Characteristics:
(i) On mixing the components the heat change is zero; ${\mathrm{\Delta H}}_{\mathrm{mix}}=0$
(ii) On mixing the components volume change is zero; ${\mathrm{\Delta V}}_{\mathrm{mix}}=0$