For a dilute solution, Raoults law states that

(1) The relative lowering of vapour pressure is proportional to the amount of solute in solution

(2) The relative lowering of vapour pressure is equal to the mole fraction of solute

(3) The lowering of vapour pressure is equal to the mole fraction of the solute

(4) The vapour pressure of the solution is equal to the mole fraction of the solvent