B.E/B.TECH DEGREE EXAMINATION,
JANUARY 2010
FIRST SEMESTER
CY2111-ENGINEERING CHEMISTRY-I
(REGULATION 2008)
PART A (10 X 2=20 MARKS)
1. Calculate the hardness of a
water sample containing 2.4 mg of calcium chloride in 500 ml of water?
2. What is Calgon? how does it
function in water treatment?
3. Why thermosetting plastics
cannot be remoulded?
4. What is the role of Sulphur in
the vulcanization of rubber?
5. Compare absorption and
adsorption.
6. Mention any four applications of
adsorption.
7. Furnish the sequence of
reactions in proton cycle nuclear fusion.
8. Give any two advantages of
alkaline battery over dry cell.
9. Define refractoriness of a
refractory.
10. What are nano materials?
Mention any two of their characteristic properties.
PART
B-(5 X 16=80)
11. i. How is temporary hardness of water estimated by EDTA
method?
ii. What are the requirements of potable water? How
will you purify water for drinking purpose?.
Or
12. i. What are ion exchange resins? How are they useful in
removing hardness of water?
ii. What is desalination? With a neat diagram, describe
the 'reverse osmosis' method for the desalination of brackish water.
13. i. how are the following polymers prepared?
1. Teflon
2. Polystyrene
3. PET
4. Nylon 6, 6
ii. Explain the mechanism of free radical addition
polymerization.
Or
14. i. What is natural rubber? Explain why natural rubber
needs vulcanization. How is it carried out?
ii. What are composites? Give the preparation and uses
of glass fiber reinforced composites and carbon fiber reinforced
composites.
15. i. Compare physisorption and chemisorption.
ii. Adsorption of gases on solids is greatly influenced
by temperature,pressure and nature of the adsorbent and adsorbate.justify.
Or
16. i. Describe the role of adsorbents in catalysis with
examples.
ii. How is ion exchange adsorption useful in
demineralization of water? Explain.
17. i. Explain with a neat diagram the parts and functions of
a nuclear reactor.
ii. Write a note on photovoltaic cell.
Or
18. i. Explain the working of hydrogen oxygen fuel
cell.
ii. Write a short note on lithium batteries.
19. i. How are alumina and carborundum manufactured?.
ii. What are refractories?how are they classified? .
Or
20. i. What are fluid and boundary lubrication?
Explain.
ii. What are carbon nano tubes? Explain any three of their
important applications?