UNIT – II – SURFACE CHEMISTRY
PART – A ( 2 Marks)
1. How does chemisorption differ from physisorption?
2. How will you increase the activity of adsorbent?
3. Define adsorption? What is an adsorption isotherm?
4. What is Freundlich’s adsorption isotherm?
5. What are promoters?
6. What is catalytic poisoning?
7. What is the effect of temperature and pressure on the adsorption of
hydrogen gas on charcoal?
HS1103- Engineering chemistry - I
Kings college of Engineering
8. Define ion-exchange adsorption
9.what is langmuir adsorption isotherm? How it is mathematically
represented?
10. What is the demerit of langmuir adsorption isotherm?
PART – B ( 16 Marks)
1. (i) Distinguish between physical adsorption and chemisorption. [6]
(ii)Derive an expression for Langmuir unimolecular adsorption isotherm.
What are its limitations? [10]
2 (i) Explain adsorption theory (or) contact theory with examples. [6]
(ii) Explain the classification & functions of ion-exchangers.[10]
3 (i) Define the term adsorption and list its application [4]
(ii) Explain the role of adsorption in demineralization of water.[8]
(iii) Give any three factors on which adsorption depends [4]
4 (i) Derive Freundlich’s adsorption isotherm. Give the conditions in which
It fails. [6]
(ii) Explain the role of adsorption in catalytic reactions [10]
5 (i) Discuss the factors which influence adsorption of gas on a solid. [8]
(ii) Define adsorption isotherm. Explain the various types of adsorption
Isotherm. [8]
6 (i) Explain the role of adsorbents in pollution abatement. [12]
(ii) Define the terms adsorbent and adsorbate giving suitable examples.[4]