A. 10-3
B. 10-10
C. 10-11
D. 10-13
Related Mcqs:
- 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 - A solution having a pH value of 5 is less acidic than the one having a pH value of 2 by a factor of ________________?
A. 3
B. 100
C. 1000
D. None of these - The hydroxyl ion (OH-) concentration in a solution having pH value 3 will be_________________?
A. 10-11
B. 10-10
C. 10-3
D. 10-4 - 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 - 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 - 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 - If pH value of an acidic solution is decreased from 5 to 2, then the increase in its hydrogen ion concentration is _____________ times?
A. 10
B. 100
C. 1000
D. 10000 - pH value of a solution containing equal concentration of hydroxyl and hydrogen ions will be_________________?
A. 0
B. 10
C. 7
D. 14 - 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
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