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Posted By: Jose Mathew Member Level: Platinum Posted Date: 20 Jun 2007
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2006 Calicut University B.E Computer Science Engineering Chemistry (A) Question paper
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COMBINED FIRST AND SECOND SEMESTER B.TECH. (ENGINEERING)
DEGREE EXAMINATION, JUNE 2006
EN 04. 104 A – ENGINEERING CHEMISTRY (A)
(For AI, CS, EE, EC, IT, IC, BM, BT, PT)
[2004 admissions]
Time : Three Hours Maximum : 100 Marks
Part A
Answer all questions.
I. 1. With a neat diagram, explain the voids in crystal structure.
2. Write short notes on (i) Ferro-electricity; and (ii) Piezoelectricity.
3. Explain the following terms :
(i) Calendering ; (ii) Die casting.
4. Give the significance of the following : (i) Aniline point ; (ii) Cloud point ; and (iii) Pour point.
5. Explain the function of salt bridge in e.m.f. measurement with a diagram.
6. Calculate the pH of a buffer solution containing 20ml. of 0.1 N acetic acid and 10 ml. of 0.1 N NaOH. If the Ka value of acetic acid is 1.75 X 10-5.
7. Corrosion products can act as a protective layer. Explain the term with the help of pilling bed worth rule.
8. Write short notes on thermal pollution.
(8 X 5 = 40 marks)
Part B
II.A. (i) How are crystalline solids classified on the nature of forces binding the constituent units ? (8 marks)
(ii) Derive Braggs equation for diffraction of X-rays by crystal. (7 marks)
Or
B. (i) What are superconductors ? Explain their properties and uses. (7 marks)
(ii) Explain the following facts :-
(a) Copper is ductile and malleable but brass is not.
(b) Sodium chloride pieces are harder than sodium metal. (8 marks)
III. A. (i) Write a note on compounding of rubber. (7 marks)
(ii) How is vulcanization of rubber carried out ? (8 marks)
Or
B. (i) Write short note on extreme pressure lubrication. (7 marks)
(ii) How is the viscosity of a lubricating oil determined ? How the viscosity index of an oil can be improved ? (8 marks)
IV. A. (i) Write short notes on :
(a) Concentration cells.
(b) Over voltage. (8 marks)
(ii) How is neutralization reactions carried out by e.m.f. measurements ? (7 marks)
Or
B. (i) Explain the construction and working of Ni/Cd cell. (7 marks)
(ii) Suggest a suitable method to determine the e.m.f. of a cell with a neat sketch. (8 marks)
V. A. (i) Explain the mechanism of electrochemical corrosion. (7 marks)
(ii) List out few methods used to control air-pollution. (8 marks)
Or
B. (i) Explain the chemistry of chrome plating with a neat diagram. (7 marks)
(ii) Explain the secondary and tertiary treatment of sewage water. (8 marks)
[4 X 15 = 60 marks]
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