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

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. Number of gram equivalent of solute dissolved in one litre of solution is called its___________________?

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

3. Number of gm moles of solute dissolved in one liter of a solution is called its____________________?

   A. Equivalent weight
   B. Molarity
   C. Molality
   D. Normality

4. If the partial pressure of the solvent in the vapor phase is equal to the vapor pressure of the solvent at that temperature, then the system is said to be at its___________________?

   A. Bubble point
   B. Saturation temperature
   C. Dew point
   D. Both B. and C.

5. 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

6. Molality is defined as the number of gm moles of solute per _____________ of solvent?

   A. Litre
   B. kg
   C. gm.mole
   D. gm

7. 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.

8. 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

9. 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.

10. At room temperature, the product [H+] [OH-] in a solution is 10-14 moles/litre. If, [OH-] = 10-6 moles/litre, then the pH of the solution will be ________________________?

    A. 6
    B. 8
    C. 10
    D. 12