1. Of physisorption or chemisorption, which has a higher enthalpy of adsorption?
2. Define adsorption with an example. Why is adsorption exothermic in nature? Write the types of adsorption based on the nature of forces between adsorbate and adsorbent.
3. What is meant by ‘shape selective catalysis?
4. CO (g) and H2 (g) react to give different products in the presence of different catalysts,Which ability of the catalyst is shown by these reactions?
5. Name the two groups into which phenomenon of catalysis can be divided. Give an example of each group with the chemical equation involved.
1. What cause Brownian movement in a colloidal solution?
2. What is the reason for the stability of colloidal sols?
3. What is the ‘coagulation’ process?
4. Explain the following terms-giving one example for each:
1. Micelles
2. Aerosol.
5. What is meant by coagulation of a colloidal solution? Describe briefly any three methods by which coagulation of lyophobic sols can be carried out.