(i) Total vapour pressure over the solution can be related to the mole
fraction of any one component (ii) Total vapour pressure over the solution varies linearly with the
mole fraction of component 2 (iii) Depending on the vapour pressures
of the pure components 1 and 2,
total vapour pressure over the
solution decreases or increases with
the increase of the mole fraction of
component 1 A plot of p1 or p2 versus the mole
fractions x1 and x2 for a solution gives a
linear plot as shown in Fig