Calicut University 2006 B.E Computer Science Engineering Chemistry (A) - Question Paper

COMBINED 1st AND 2nd 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 : 3 Hours Maximum : 100 Marks

Part A

ans all ques..

I. 1. With a neat diagram, discuss the voids in crystal structure.
2. Write short notes on (i) Ferro-electricity; and (ii) Piezoelectricity.
3. discuss the subsequent terms :
(i) Calendering ; (ii) Die casting.
4. provide the significance of the subsequent : (i) Aniline point ; (ii) Cloud point ; and (iii) Pour point.
5. discuss the function of salt bridge in e.m.f. measurement with a diagram.
6. compute 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. discuss the term with the help of pilling bed worth rule.
8. Write short notes on thermal pollution.
(8 X five = 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 formula for diffraction of X-rays by crystal. (7 marks)

Or

B. (i) elaborate superconductors ? discuss their properties and uses. (7 marks)
(ii) discuss the subsequent 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) discuss 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) discuss the mechanism of electrochemical corrosion. (7 marks)
(ii) List out few methods used to control air-pollution. (8 marks)
Or
B. (i) discuss the chemistry of chrome plating with a neat diagram. (7 marks)
(ii) discuss the secondary and tertiary treatment of sewage water. (8 marks)
[4 X 15 = 60 marks]

Earning:   Approval pending.