A. H+ ions are absent
B. OH- ions are absent
C. Both H+ and OH- ions are present in very small but equal concentration
D. None of these
Related Mcqs:
- 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 - For a neutral solution (pH = 7), the value of [H+] [OH-] is equal to_________________?
A. 0
B. 1
C. 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 - 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 - 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 - 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 - 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 - A solution which resists change in its pH value on addition of acid/alkali is called the ____________________ solution?
A. Neutral
B. Ideal
C. Buffer
D. Zero pH - 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 - The elevation in boiling point of a solution is proportional to the ______________ of the solution?
A. Molal concentration
B. Reciprocal of the molal concentration
C. Normality
D. Molarity
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