UNIT:5

SURFACE CHEMISTRY

  M.M. 22

 

1. Differentiate between absorption and adsorption.                                                                          2
2. Explain the following terms: 2

(a) Electro dialysis                  (b) Gels

3. Describe and explain what is observed when: 3

(i) A beam of light is passed through a colloidal solution of As₂ S₃.

(ii) Electric current is passed through a colloidal solution.

4. Explain lock and key model of enzyme activity. 2
5. What are emulsions? How will you distinguish between two different types of emulsions?           2
6. Explain Hardy-Schulze rule by taking a suitable example. 2
7. State an example of: 2

(i) Enzyme                   (ii) aerosol

8. Explain the application of colloids in. 2

(i) the formation of delta.

(ii) smoke precipitation.

9. What are associated colloids? Explain the formation of Micelles.                                                    3
10. What is meant by Brownian Motion? What is the significance of Brownian motion?    2