Which of the following is followed by an ideal solution ?

Related Mcqs:

1. 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

2. Which of the following holds good for a solution obeying Raoult’s law (i.e., an ideal solution) (where, ΔH = heat of mixing, and ΔV = volume change on mixing) ?

   A. ΔH = 1 (+ ve) and Δ V = -ve
   B. ΔH = 0
   C. ΔV = 0
   D. Both B. and C.

3. The activity co-efficient of a solution, which accounts for the departure of liquid phase from ideal solution behaviour________________?

   A. Measures the elevation in boiling point
   B. Is not dependent on the temperature
   C. Is a function of the liquid phase composition
   D. Measures the depression in freezing point

4. The chemical potential of any constituent of an ideal solution depends on the ______________ of the solution?

   A. Temperature
   B. Pressure
   C. Composition
   D. All (A), B. and (C)

5. Acidity or alkanity of a solution is expressed by its pH value, which is defined as (where, [H+] = hydrogen ion concentration in the solution) ?

   A. log (1/H+)
   B. – log (1/H+)
   C. 1/log H+
   D. None of these

6. The pH value of a solution is 5.9. If the hydrogen ion concentration is decreased hundred times, the solution will be______________?

   A. Basic
   B. More acidic
   C. Neutral
   D. Of the same acidity

7. 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

8. 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

9. For an ideal liquid solution, which of the following is unity ?

   A. Activity
   B. Fugacity
   C. Activity co-efficient
   D. Fugacity co-efficient

10. 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