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Surface Chemistry 2 Mark Creative Question Paper With Answer Key

12th Standard

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Chemistry

Time : 01:00:00 Hrs
Total Marks : 30

    2 Marks

    15 x 2 = 30
  1. In a coagulation experiment 10 mL of a colloid (X) is mixed with distilled water and 0.1M solution of an electrolyte AB so that the volume is 20 mL. It was found that all solutions containing more than 6.6 mL of AB coagulate with in 5 minutes. What is the flocculation values of AB for sol (X)?

  2. What is an interface?

  3. What do you mean by positive and negative adsorption?

  4. Define adsorption isobar.

  5. Define adsorption isotherm.

  6. What are limitations of Freundlich adsorption isotherm?

  7. What are the concepts of catalysis that intermediate compound formation theory throws light on?

  8. What are the limitations of intermediate compound formation theory?

  9. What is a dispersed phase and a dispersion I medium in a colloid?

  10. What are the methods by which colloids are prepared?

  11. What is ultrasonic dispersion?

  12. When are condensation methods used for the preparation of colloids?

  13. Why are colloids purified?

  14. What are main impurities in a colloidal solution?

  15. Give the methods of purification of colloids.

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