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Posted By: Mala Member Level: Diamond Posted Date: 14 Jan 2008
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2007 Bangalore University B.E Engineering Chemistry First / Second Semester B. E. Degree Examination, July 2007 Question paper
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First / Second Semester B. E. Degree Examination, July 2007
Common to All Branches
Engineering Chemistry
Time: 3 Hrs.] [Max. Marks: 100
Note: Answer any FIVE full questions, choosing at least TWO from each part.
PART A
1. a. Describe Fischer-Tropsch method of synthesis of petrol. (06 Marks)
b. Explain the process of doping of silicon. (05 Marks)
c. What is cracking? Explain fluidized catalytic cracking. (05 Marks)
d. Discuss the mechanism of knocking. (04 Marks).
2. a. Explain the origin of single electrode potential. Derive Nernst equation for electrode potential. (07 Marks)
b. What are reference electrodes? Mention the limitations of primary reference electrode and advantages of secondary reference electrodes. (04 Marks)
c. Write a note on calomel electrode. (04 Marks)
d. Represent the cell formed by the coupling of two copper electrodes immersed in cupric sulphate solutions. Concentration of cupric ions in one electrode system is 100 times more concentrated than the other. Write the cell reaction and calculate the potential at 300K. (05 Marks)
3. a. Define fuel cell. How does it differ from a conventional galvanic cell? (04 Marks)
b. Explain the following fuel cells:
i) Molten carbonate ii) Solid polymer efficiency. (06 Marks)
c. Explain the following battery characteristics:
i) Cycle life ii) Shelf life iii) energy efficiency (06 Marks)
d. Describe the construction and working of zinc-air battery. (04 Marks)
4. a. Define corrosion. Explain electrochemical theory of corrosion, taking iron as an example. (08 Marks)
b. Explain differential metal corrosion with suitable examples. (06 Marks)
c. What is cathodic protection? Explain corrosion control by sacrifical anode method. (06 Marks)
PART B
5. a. What is electroless plating? Mention its advantages. (04 Marks)
b. Discuss the following factors influencing the nature of deposit:
i) Throwing power ii) pH of the electrolytic bath and iii) Temperature.
(06 Marks)
c. Discuss the electroplating of gold and mention its applications. (05 Marks)
d. Discuss electroless plating of copper and its applications. (05 Marks)
6. a. Distinguish between thermotropic and lytotrpic liquid crystals with examples.
(06 Marks)
b. Explain the working of a liquid crystal in display systems. (06 Marks)
c. What are teh advantages of instrumental methods. (03 Marks)
d. Explain the estimation of amount of strong acid in a given solution conductometrically. (05 Marks)
7. a. Define polymerization. Explain solution and suspension polymerization techniques. (05 Marks)
b. Give the synthesis, properties and uses of i) Teflon ii) Butyl rubber.
(10 Marks)
c. What are conducting polymers? Give the structure of polyantiline and mention its applications. (05 Marks)
8. a. Discuss the types of impurities present in natural water. (04 Marks)
b. Explain the determination of hardness of water by Complexometeric method. (06 Marks)
c. Explain the electodialysis method of desalination of water. (04 Marks)
d. Discuss determination of chloride by Argentometric method. (06 Marks)
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