5.3. Give reason why a finely divided substance is more effective as an adsorbent?
5.4. What are the factors which influence the adsorption of a gas on a solid?
5.5. What is an adsorption isotherm? Describe Freundlich adsorption isotherm.
5.6. What do you understand by activation of adsorbent? How is it achieved?
5.7. What role does adsorption play in heterogeneous catalysis?
5.8. Why is adsorption always exothermic?
5.9. How are the colloidal solutions classified on the basis of physical states of the dispersed phase and dispersion medium?
5.10. Discuss the effect of pressure and temperature on the adsorption of gases on solids.
5.11. What are lyophilic and lyophobic sols? Give one example of each type. Why are hydrophobic sols easily coagulated?
5.12. What is the difference between multimolecular and macromolecular colloids? Give one example of each.
5.13. What are enzymes? Write in brief the mechanism of enzyme catalysis.
5.14. How are colloids classified on the basis of
5.15. Explain what is observed
5.16. What are emulsions? What are their different types? Give example of each type.
5.17. How do emulsifires stabilise emulsion? Name two emulsifiers.
5.18. Action of soap is due to emulsification and micelle formation. Comment
5.19. Give four examples of heterogeneous catalysis.
5.20. What do you mean by activity and selectivity of catalysts?