Which of the following has the smallest least effect on the solubility of a solute into the solvent ?

Related Mcqs:

1. 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

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

3. 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

4. Addition of a non-volatile solute to a solvent produces a ______________ in its solvent?

   A. Freezing point elevation
   B. Boiling point depression
   C. Vapor pressure lowering
   D. All A., B. & C.

5. 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

6. For most salts, the solubility increases with rise in temperature, but the solubility of _______________ is nearly independent of temperature rise?

   A. Sodium chloride
   B. Sodium carbonate monohydrate
   C. Anhydrous sodium sulphate
   D. Hypo

7. Sodium ______________ has inverted solubility curve i.e. its solubility increases with the lowering of temperature?

   A. Carbonate (monohydrate)
   B. Chloride
   C. Thiosulphate
   D. Bisulphite

8. 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.

9. Number of gm moles of solute dissolved in 1 kg of solvent is called its___________________?

   A. Normality
   B. Molarity
   C. Molality
   D. Formality

10. 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