If pH value of an acidic solution is decreased from 5 to 2, then the increase in its hydrogen ion concentration is _____________ times?

Related Mcqs:

1. 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

2. 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

3. The atomic weight of helium is 4 times that of hydrogen. Its diffusion rate as compared to hydrogen will be _____________ times?

   A. 1/2
   B. 4
   C. √2
   D. 1/4

4. pH value of a solution containing 1 gm of hydrogen ion per litre will be ____________________?

   A. 0
   B. 1
   C. 7
   D. 10

5. 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

6. Hydrogen ion concentration in distilled water is___________________?

   A. 10-7
   B. 7 × 10-7
   C. 107
   D. 7 × 107

7. pH value of a solution containing equal concentration of hydroxyl and hydrogen ions will be_________________?

   A. 0
   B. 10
   C. 7
   D. 14

8. 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

9. The osmotic pressure of a solution increases, if its _____________ is decreased?

   A. Volume
   B. Solute concentration
   C. Temperature
   D. None of these

10. 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