21.The molality of an aqueous solution of NaOH containing 8 gram in 2 litres of solution is:

22.The amount of gas dissolving in a given volume of the liquid decreases when

23.The osmotic pressure of 0.1 molar aqueous solution at 20 degreeCentigrade is

24.34.2 gm of sugar (mol. wt. 342) is dissolved in 90 gm of water at the boiling point of water, vapour pressure of solution at that very temperature will be

25.According to Raoults law for solution containing non-volatile solution, the relative lowering of vapour pressure for solution is