Engineering Chemistry 2009 Kerala University Question paper

2009 Kerala University B.Tech Mechanical Engineering S1 & S2 B.Tech.Degree Examination, May 2009 (2008 Scheme), Engineering Chemistry Question paper

S1 & S2 B.Tech.Degree Examination, May 2009 (2008 Scheme)

ENGINEERING CHEMISTRY

Time : 3 Hours Max. Marks : 100

PART-A

Answer all questions.

1. What is Helmholtz electrical double layer?
2. Draw neatly a labeled diagram of saturated Calomel Electrode. Also give the redox reaction involved.
3. How are nano materials prepared by laser-abrasion technique?
4. What is meant by cathodic protection? How is it done?
5. Calculate the emf of the following cell at 298 K.
Cu(s)/Cu^2+ (aq) (0.02M) // Cu^2+ (aq)/Cu(s)(0.2M)
6. Differentiate between aerobic oxidation and anaerobic oxidation.
7. Outline the principle and application of gas chromatography.
8. How are the following elastomers prepared?
9. What are conducting polymers? Give two examples with their chemical structures.
10. Outline the functions of drying oils and thinners in paint.
[10x4=40 Marks]


PART-B

Answer any two full question from each Module

Module-I [20 Marks]

11. What is quinhydron electrode? Explain how it is used to determine the pH of a solution, by coupling with a saturated Calomel electrode.

12. Write notes on:
(a) Corrosion inhibitors (b) Chemical conversion coatings.

13. What are the advantages of conductometric titrations over ordinary Volumetric methods? Illustrate the different cases of conductometric titrations with suitable examples.

Module-II [20 Marks]
14. Explain the major boiler trobles, their reasons and remedies.

15. Discuss the basic principle of thermo gravimetric analysis with the instrumentation, graphical interpretation and applications.

16. What is the significance of BOD and COD in sewage treatment? How Bod is determined? Explain the USAB process.

Module-III [20 Marks]

17. Differentiate between gross calorific value and net calorific value of a fuel. How is the calorific value of a solid fuel determined?

18.(a) What is mean by compounding of plastics? Explain the different molding constituents with their functions with examples.

(b) Write note on Silicon Rubber.

19. Write detailed notes on:

(a) Extreme pressure lubrication.

(b) Setting and hardening of Portland Cement.

[20x3=60 Marks]

FEEL USEFUL PLEASE GIVE +1