A. Freezing point elevation
B. Boiling point depression
C. Vapor pressure lowering
D. All A., B. & C.
Related Mcqs:
- The vapor pressure of the solvent decreased by 10 mm Hg, when a non-volatile 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 vapor pressure of the solvent is required to be 20 mm Hg ?
A. 0.2
B. 0.1
C. 0.4
D. 0.6 - Addition of a non-volatile solute to a pure solvent ____________________?
A. Increases its freezing point
B. Increases its boiling point
C. Decreases its freezing point
D. Both B. and C. - Osmotic pressure of a dilute solution of a non volatile solute in a solvent obeying Raoult’s law is proportional to the_____________?
A. Temperature
B. Volume of solution
C. Moles of non-volatile solute
D. None of these - A very dilute solution is prepared by dissolving ‘x1’ mole of solute in ‘x2’ mole of a solvent. The mole fraction of solute is approximately equal to_________________?
A. x1/x2
B. x2/x1
C. 1 – (x1/x2)
D. 1/x2 - The vapour pressure of a solution (made by dissolving a solute in a solvent) is ____________ that of the pure solvent?
A. Less than
B. More than
C. Equal to
D. Either more or less; depends on the solvent - In case of a ternary system involving two liquid components and a solute, the ratio of the concentration of the solute in the two phases at equilibrium is called the distribution co-efficient. The distribution co-efficient depends upon the______________?
A. Solute concentration
B. Temperature
C. Both A. & B.
D. Neither A. nor B. - A solute distributes itself between two non-miscible solvents in contact with each other in such a way that, at a constant temperature, the ratio of its concentrations in two layers is constant, irrespective of its total amount”. This is_________________?
A. The distribution law
B. Followed from Margules equation
C. A corollary of Henry’s law
D. None of these - Heat of solution in a system in which both solute and solvent are liquids is termed as_________________?
A. Heat of solvation
B. Heat of hydration
C. Standard integral heat of solution
D. Heat of mixing - Osmotic pressure exerted by a solution prepared by dissolving one gram mole of a solute in 22.4 litres of a solvent at 0°C will be _______________ atmosphere?
A. 0.5
B. 1
C. 1.5
D. 2 - Which of the following has the least (almost negligible) effect on the solubility of a solute in a solvent ?
A. Temperature
B. Nature of solute
C. Pressure
D. Nature of solvent
