Hydrogen ion concentration in distilled water is___________________?

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. 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

3. 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

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. With increase in the temperature of pure (distilled) water, its____________________?

   A. pOH decreases and pH increases
   B. pOH and pH both decreases
   C. pH and pOH both increases
   D. pH decreases and pOH increases

6. 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

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. Equal masses of CH4 and H2 are mixed in an empty container. The partial pressure of hydrogen in this container expressed as the fraction of total pressure is___________________?

   A. 1/9
   B. 8/9
   C. 1/2
   D. 5/9

9. Presence of nitrogen in high concentration in contaminated air reduces partial pressure of oxygen in lungs, thereby causing asphyxia (suffocation) leading to death from oxygen deficiency. Concentration of N2 in contaminated air at which it acts as a natural asphyxiate is ≥ _____________ percent?

   A. 84
   B. 88
   C. 80
   D. 92

10. Phenolic water generated in coke ovens & by-product plant attached to an integrated steel plant containing phenol in concentration of less than 100 mg/litre can be removed by_______________?

    A. Chlorination
    B. Treating in biological oxygen pond
    C. Chemical coagulation
    D. None of these