Which of the following mixtures forms a maximum boiling azeotrope?

At $80^\circ C$, the vapour pressure of pure liquid 'A'is 520 mm Hg and that of pure liquid 'B' is 1000 mm Hg. If a mixture of solution 'A'\;{\rm{and}}\;'B' boils at $80^\circ C$ and 1 atm pressure, the amount of 'A' in the mixture is : (1 atm = 760 mm Hg)

The relative lowering of vapour pressure of an aqueous solution containing non-volatile solute is 0.0125. The molality of the solution is

The plots of $\frac{1}{{{X_A}}}\;vs.\;\frac{1}{{{Y_A}}}$ (where ${X_A}\;{\rm{and}}\;{Y_A}$ are the mole fraction of liquid A in liquid and vapour phase respectively) is linear with slope and intercepts respectively:

A mixture of liquids A and B shows a vapor pressure higher than predicted by Raoult's law. Which of the following is true about the intermolecular forces between A and B?

At $88^\circ C$ benzene has a vapour pressure of 900 torr and toluene has a vapour pressure of 360 torr. What is the mole fraction of benzene in the mixture with toluene that will boil at $88^\circ C$ at 1 atm pressure, benzene-toluene form an ideal solution?

The relative lowering of vapour pressure produced by dissolving 71.5 g of a substance in 1000 g of water is 0.00713. The molecular weight of the substance will be :

Two liquids X and Y form an ideal solution. The mixture has a vapour pressure of 400 mm at 300 K when mixed in the molar ratio of 1:1 and a vapour pressure of 350 mm when mixed in the molar ratio of 1:2 at the same temperature. The vapour pressures of the two pure liquids X and Y respectively are

Which of the following is NOT a characteristic of an ideal solution?

The vapour pressure of benzene at $90^\circ C$ is 1020 torr. A solution of 5 g of a solute in 58.5 g benzene has vapour pressure 990 torr. The molecular weight of the solute is :

A solution of liquids A and B shows no change in volume and no heat exchange upon mixing. This indicates that: