Mahatma Gandhi University (MGU) 2006 B.Tech Electronics Engineering Engineering Chemistry - Question Paper

B.TECH. DEGREE EXAMINATION, MAY/JUNE 2006

First and 2nd Semester

ENGINEERING CHEMISTRY

(2002 admission onwards – Regular / Supplementary)

[Common for all branches]

Time : 3 Hours Maximum : 100 Marks

1. What are reversible and irreversible cells? provide examples.
2. Write a note on concentration cells.
3. What is ebonite? How is it obtained?
4. Write a detailed account of condensation polymerization.
5. Explain Dry corrosion.
6. How is corrosion prevented by cathodic protection?
7. What are boiler scales? define the harmful effects of boiler scale formation.
8. Explain the term “reverse osmosis”.
9. Why is a small volume of ethyl bromide added to petrol along with antiknocking agent, TEL?
10. Write a short note on “Solid lubricants”.
(10 X four = 40 marks)

Part B

11. (a) describe electromotive force. How is it measured by potentiometric method? What will be the e.m.f. of the cell at 250 C. Zn (s) | Zn2+(0.001M) || FeFe2+(0.005M) | Fe(s) provided that E0(Zn2+, Zn) = -0.76 V and E0(Fe2+, Fe) = -0.44 V.
Or
(b) (i) discuss various applications of electrochemical series.
(ii) Write a short note on fuel cells.

12. (a) provide the preparation, structure and uses of Terylene and PVC. Differentiate ranging from thermoplastic and thermosetting resins. provide 2 examples every.
Or
(b) (i) discuss the important moulding techniques for fabrication of plastics.
(ii) discuss the preparation, properties and industrial uses of Buna rubbers.

13. (a) Dsicuss in detail about the different factors which affect corrosion.
Or
(b) elaborate organic and inorganic coatings?

14. (a) elaborate the external and internal treatment needed for prevention of scale formation in boilers? discuss the disadvantages of lime soda process for treatment of water.
Or
(b) describe desalination. define electrodialysis method of desalination with a neat diagram.

15. (a) elaborate different causes of air-pollution and how can it be controlled?
Or
(b) elaborate the important properties of lubricants? Write a short note on synthetic lubricants.
(5 X 12 = 60 marks)

Earning:   Approval pending.