If mole fraction of the solvent in a solution decreases than:

If mole fraction of the solvent in a solution decreases then:

If P^(@) and P_(S) are the vapour pressure of the solvent and solution respectively, n_(1) and n_(2) are the mole fractions of the solvent and solute respectively, then:

If P_(@) and P_(S) are the vapour pressure of the solvent and its solution respectively and x_(1) and x_(2) are the mole fraction of the solvent and solute respectively, then

If P^(@) and P_(5) are the vapour pressure of the solvent and its solution respectively and x_(1) and x_(2) are the mole fraction of the solvent and solute respectively, then

The vapour pressure of a solvent decreased by 10 mm of mercury, when a non-volalite solute was added to the solvent. The mole fraction of the solute in the solution is 0.2. What should be the mole fraction of the solvent, if the decrease in the vapour pressure is to be 20 mm of mercury ?