Solution

The vapour pressure of a solvent at 283 K is 100 mm Hg.Calculate the vapour pressure of dilute solution containing 1mol of strong electrolyte AB in 50 moles of the solvent 283K (assuming complete dissociation of solution AB)

A 3% solution of glucose (molar mass:180 gmol-1)is isotonic with 2.5% solution of an unknown organic substance.Calculate the molecular weight of the unknown organic substance

The relative lowering of vapour pressure of an aqueous solution containing non-volatile solute is 0.0225. The mole fraction of the non volatile solute is

• 0.80

• 0.725

• 0.15

• 0.0225

On mixing 10mL of acetone with 50mL of chloroform,the total volume of the solution will be

• <60mL

• >60mL

• =60mL

• =100mL

18 g of glucose, C6H12O6 (molar mass = 180 g mol¹), is dissolved in 1 kg of water in a sauce pan. At what temperature will this solution boil?(Kb for water = 0.52 K kg mol¹, boiling point of pure water = 373.15 K)

A 1.00 molal solution of trichloroacetic acid (CCI3COOH) is heated to its boiling point. The solution has the boiling point of 100.18°C.

Determine the van't Hoff factor for trichloroacetic acid (Kb for water = 0.512 K kg mol¹)

A solution containing 15 g urea (molar mass = 60 g mol¹) per litre of solution in water has the same osmotic pressure (isotonic) as a solution of glucose (molar mass = 180 g mol 1) in water. Calculate the mass of glucose present in one litre of its solution