Hydrogen ion concentration in mol/L in a solution of pH = 5.4 wil

Previous Year Papers

Download Solved Question Papers Free for Offline Practice and view Solutions Online.

Test Series

Take Zigya Full and Sectional Test Series. Time it out for real assessment and get your results instantly.

Test Yourself

Practice and master your preparation for a specific topic or chapter. Check you scores at the end of the test.
Advertisement

 Multiple Choice QuestionsMultiple Choice Questions

401.

Which of the following represents the correct pH of a 10-7 M HCl in doubly distilled air-free water?

  • 6.6990

  • 7.0000

  • 7.3010

  • 6.3980


402.

The solubihty of AgI in NaI solution is less than that in pure water because

  • Agl forms complex with Nal

  • of common ion effect

  • solubility product of AgI less

  • the temperature of the solution decreases


Advertisement

403.

Hydrogen ion concentration in mol/L in a solution of pH = 5.4 will be

  • 3.98 × 108

  • 3.88 × 106

  • 3.68 × 10-6

  • 3.98 × 10-6


D.

3.98 × 10-6

pH = -log[H+]

5.4 = -log[H+]

[H+]= antilog (-5.4) = 3.98 × 10-6


Advertisement
404.

XY2 dissociated as XY2(g) XY(g) + Y (g) When the initial pressure of XY2 is 600 mm Hg, the total equilibrium pressure is 800 mm Hg. Calculate K for the reaction assuming that the volume of the system remains unchanged.

  • 50

  • 100

  • 166.6

  • 400.0


Advertisement
405.

For the following equilibrium, N2O4 2NO2 in the gaseous phase, NO2 is 50% of the total volume when equilibrium is set up. Hence, per cent of dissociation of N2Ois

  • 50%

  • 25%

  • 66.66%

  • 33.33%


406.

Of the given anions, the strongest Bronsted base is

  • ClO-

  • ClO3-

  • ClO2-

  • ClO4-


407.

At equilibrium, if KP = 1, then

  • G° > 1

  • G° < 1

  • G° = 0

  • G° = 1


408.

Which of the following is most acidic?

  • H2O

  • H2S

  • H2Se

  • H2Te


Advertisement
409.

1 mL of 0.01 N HCl is added to 999 mL solution of 0.1 N Na2SO4. The pH of the resulting solution will

  • 2

  • 7

  • 5

  • 1


410.

The equilibrium constants for the reaction,

Br2  2Br → 1

at 500 K and 700 K are 1 × 10-10 and 1 × 10-5 respectively. The reaction is

  • endothermic

  • exothermic

  • fast

  • slow


Advertisement