Concentration of a solution expressed in terms of _______________ is independent of temperature?

Related Mcqs:

1. 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

2. In a binary liquid system, the composition expressed as _______________ is independent of the temperature & pressure?

   A. Kg of solute/kg of solvent
   B. Kg-mole of solute/kg-mole of solvent
   C. Kg-mole of solute/1000 kg of solvent
   D. All A., B. & C.

3. 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

4. On addition of 1 c.c. of dilute hydrochloric acid (1% concentration) to 80 c.c. of a buffer solution of pH = 4, the pH of the solution becomes_________________?

   A. 1
   B. 8
   C. 4
   D. 2

5. 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

6. 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

7. The most convenient way of expressing solution concentration is in terms of___________________?

   A. Mole fraction
   B. Normality
   C. Molality
   D. Molarity

8. 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

9. A solution with reasonably permanent pH is called a/an _______________ solution?

   A. Ideal
   B. Non-ideal
   C. Buffer
   D. Colloidal

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