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.

Surface Chemistry

Multiple Choice Questions

61.

Which of the following has maximum value of flocculating power ?

Pb²⁺
Pb⁴⁺
Sr²⁺
Na⁺

62.
Which mixture of the solutions will lead to the formation of negatively charged colloidal [Agl]l– sol ?

50 mL of 1 M AgNO₃ + 50 mL of 2 M KI

50 mL of 2 M AgNO₃ + 50 mL of 1.5 M KI

50 mL of 0.1M M AgNO₃ + 50 mL of 0.1 M KI

50 mL of 1 M AgNO₃ + 50 mL of 1.5 M KI

50 mL of 1 M AgNO₃ + 50 mL of 2 M KI

Generally charge present on the colloid is due to adsorption of common ion from dispersion medium. Millimole of KI is maximum in option (2) (50 × 2 = 100) so act as solvent and anion I^– is adsorbed by the colloid AgI formed

${AgNO}_{3} + KI \to AgI + {KNO}_{3} D . P \underset{(excess)}{D . M} \underset{colloid}{Negative charged}$

Previous Year Papers

Test Series

Test Yourself

Multiple Choice Questions

62. Which mixture of the solutions will lead to the formation of negatively charged colloidal [Agl]l– sol ? 50 mL of 1 M AgNO3 + 50 mL of 2 M KI 50 mL of 2 M AgNO3 + 50 mL of 1.5 M KI 50 mL of 0.1M M AgNO3 + 50 mL of 0.1 M KI 50 mL of 1 M AgNO3 + 50 mL of 1.5 M KI

62.
Which mixture of the solutions will lead to the formation of negatively charged colloidal [Agl]l– sol ?

50 mL of 1 M AgNO₃ + 50 mL of 2 M KI

50 mL of 2 M AgNO₃ + 50 mL of 1.5 M KI

50 mL of 0.1M M AgNO₃ + 50 mL of 0.1 M KI

50 mL of 1 M AgNO₃ + 50 mL of 1.5 M KI