A. Removal of pure solvent by evaporation
B. Change of temperature thereby causing super-saturation
C. Changing the nature of the system by the addition of a more soluble material
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 - 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 - A solution is made by dissolving 1 kilo mole of solute in 2000 kg of solvent. The molality of the solution is_________________?
A. 2
B. 1
C. 0.5
D. 0.05 - Na2SO4. 10H2O crystals are formed by cooling 100 Kg of 30% by weight aqueous solution of Na2SO4. The final concentration of the solute in the solution is 10%. The weight of crystals is________________?
A. 20
B. 32.2
C. 45.35
D. 58.65 - 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. - 80 kg of Na2SO4 (molecular weight = 142) is present in 330 kg of an aqueous solution. The solution is cooled such that. 80 kg of Na2SO4 .10H2O crystals separate out. The weight fraction of Na2SO4 in the remaining solution is_________________?
A. 0.00
B. 0.18
C. 0.24
D. 1.00 - Number of gram equivalent of solute dissolved in one litre of solution is called its___________________?
A. Normally
B. Molarity
C. Molality
D. Formality - 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 - Vapor pressure of a solution is proportional to (where, Sv and St are mole fraction of solvent and solute respectively) ?
A. Sv
B. 1/St
C. St
D. 1/Sv
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