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

Related Mcqs:

1. 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

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 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. 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

6. A sample of well water contains 140 gm/m3 Ca2+ ions and 345 gm/m3 Na+ ions. The hardness of the sample of water, expressed in terms of equivalent CaCO3 in gm/m3 is (assuming atomic masses of Ca :40, Na : 23, C : 12, O : 16) ?

   A. 350
   B. 485
   C. 140
   D. 345

7. 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

8. 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

9. 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

10. A butane isomerisation process produces 70 k.mole/hr of pure iso-butane. A purge stream removed continuously, contains 85% n-butane and 15% impurity (mole%). The feed stream is n-butane containing 1% impurity (mole%). The flow rate of the purge stream will be_________________?

    A. 3 kmole/hr
    B. 4 kmole/hr
    C. 5 kmole/hr
    D. 6 kmole/hr