University: Anna University
Subject: Engineering Chemistry
Paper: January 2010
Duration: 3 hours Marks: 100
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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 can not 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 nanomaterials? Mention any two of their characteristic properties.
11 (a) (i) How is temporary hardness of water estimated by EDTA method?(8)
(a) (ii) What are the requirements of potable water? How will you purify water for drinking purpose? (8)
OR
11 (b) (i) What are ion exchange resins? How are they useful in removing hardness of water? (8)
(b)(ii) What is desalination? With a neat diagram, describe the ‘reverse osmosis’ method hr the desalination of brackish water. (8)
12 (a) How are the following polymers prepared? (8) (l) Teflon (2) Polystyrene (3) PET (4) Nylon 6, 6. (ii) Explain the mechanism of free radical addition polymerization. (8)
OR
12 (b) (i) What is natural rubber? Explain why natural rubber needs vulcanization. How is it carried out? (8)
(ii) What are composites? Give the preparation and uses of glass fiber reinforced compusites and carbon fiber reinforced composites. (8)
13 (a) (i) Compare physisorption and chemisorption. (8)
(b) (ii) Adsorption of gases on solids is greatly influenced by temperature, pressure and nature of the adsorbent and adsorbate. Justify. (8)
OR
13(b) (i) Describe the role of adsorbents in catalysis with examples. (3)
(ii) How is the ion exchange adsorption useful in demineralization of water? Explain. (8)
14 (a) (1) Explain with a neat diagram the parts and functions of a nuclear reactor. (8)
(ii) Write a note on photovoltaic cell. (8)
14. (b) Explain the working of hydrogen-oxygen fuel cell.
(ii) Write a short note on lithium batt-erim.(3)
15. (a) How are alumina and carborundum manufactured? (ii) What are refractorim? How are they classified?.
15. (b) What are fluid and boundary lubrications‘? Explain. (8) (ii) What are carbon nanotubes‘? Explain any three of their important applications, (8)
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University: Anna University
Subject: Engineering Chemistry
Paper Code: E3068
Paper: May / June 2010
Duration: 3 hours Marks: 100
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1. How is water sterilized by ozone?
2. What is calgon conditioning?
3. Why thermosetting plastics can not be remoulded?
4. Mention two advantages of polymer matrix composites.
5. What is Heundlioh‘s adsorption isotherm?
6. Mention any four applications of adsorption.
7. Distinguish between unclear fission and fusion reactions.
8. What are the applications of lithium batteries?
9. What is meant by thermal spafling with respect to a refractory?
10. Under what situations solid lubricants are used
11 (a) (i) Differentiate between physisorption and chemisorption.
(ii) 0.28 g of CaCOa was dissolved in HCl and the solution was made upto one liter with distilled water. 100 ml of the above solution required 28 m! of EDTA solution on titration. 100 in] of a hard Water sample required 33 ml of same EDTA solution on titration. Another 100 ml of the same water, after hoiling cooling and filtering required 10 ml of EDTA solution on titration. Calculate the temporary and permanent hardness of water.
(iii)100 ml of raw water sample on titration with N/SU H2804 required 12 ml of the acid to phenolphthalein endpoint and 15.5 ml of the acid to methyl orange indicator. Determine the type and amount of alkalinity present in the water sample. (4)
What is break point chlorination? Indicate its significance.
OR
11. (b) (i)Explain the demineralization of water by ion-exchange process. How are
exhausted cation and anion exchange resins regenerated?
(ii) What is reverse osmosis? Explain desalination of water by reverse osmosis method. What are the advantages of RO method? (8)
12(a) (i) Distinguish between addition and condensation polymerizations with one example each. (8)
(ii)Give the preparation and uses of Lexan. Mention the properties of engineering plastics.
OR
12 (b)(i) What is vulcanization? Explain why natural rubber needs vulcanization.
How it carried nut?
(ii) What are composites? Write a detailed note on fibre-reinforced composites.
13 (a) What are the various factors influencing the adsorption of a gas on a solid? (8)
OR
What is the role of adsorbents in catalysis? (8)
14 (ii) What is the role of activated carbon in air and water pollution control? (3)
15 (a) (i)With a neat sketch explain the working of light water nuclear power plant.(3)
a (ii) Write a. note on solar cells. (3)
(b) What is reversible battery? Describe the construction and working of Lead acid storage battery with reactions occurring during charging and discharging cycles. (3)
(ii) What are fuel cells? Describe the construction and working of Hg-Og fuel cell. (a) Explain any five properties of refractories? (3) (ii) are abrasives? How are they classified? Give one example for each. 15 (b) (i) What are fluid and boundary lubrication? Explain.(3) (b) (ii) What are carbon nano tubes? Explain any three of their important applications. (3) |
University: Anna University
Subject: GE2111 Engineering Graphics(EG)
Paper: November / December 2010
Question Paper Code: 53111
Duration: 3 hours Marks: 100
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Part A - (10 x 2 20 Marks)
1. Define alkalinity. List the different types of alkalinity. 2. What is calgon conditioning? 3. Differentiate between addition and condensation polymerization techniques. 4. What are FRPS? Name any two important FRPs. 5. What are the different types of adsorption? 6. What do you understand by ‘purification by adsorption’ 7 7. What are non-conventional energy sources? Give two examples. 8. Write the chemical reactions taking place at cathode and anode in a. hydrogenoxygen fuel cell. 9. How is refractoriness under- load measured? 10. Define flash and fire points of a lubricant. Part B- (5 x 16 : 80 Marks) 11. (a) Explain the steps involved in domestic water treatment. (8) (ii) Define hardness. Classify the types of hardnesses. How are they estimated? (8) OR 11. (b) Discuss in detail the disadvantages“ which are caused by the use of hard water in boilers with special reference to foaming, corrosion, scale and sludge formation and caustic embrittlement. (10) (ii) Discuss in detail desalination of water by reverse osmosis. List its advantages and limitations. (6) 12. (a) How are the following polymers prepared? (8) (l) Teflon (2) Polystyrene (3) PET (4) Nylon 6, 6. (ii) Explain the mechanism of free radical addition polymerization. (8) OR 12. (b) What is vulcanization of rubber? List out the changes caused due to the vulcanization of rubber. (8) (ii) What are synthetic rubbers? How is butyl rubber prepared? 13. (a) Explain the effect of pressure on adsorption. (8) (ii) Explain the assumptions of Langmuir's adsorption theory. (8) 13. (b) (i) It is stated that ‘Solid surfaces can adsorb dissolved solutes from solutions’ * Give an example of such a case. What are the commonly encountered adsorption isotherms applicable for adsorption of solutes from solutions? Explain the effect of concentration of solute in the solution. (8) (ii) Discuss the role of adsorption in catalysis. (8) 14. (a) (i) What is unclear Explain the nuclear fission of as a. source of energy. (8) (ii) Explain the principle of operation of solar cells. (8) OR 14. (b) Outline the construction and working of a lead-acid battery. (8) (ii) Explain the Construction of a nickel-cadmium cell and give its cell reaction. (3) 15. (a) (i) Explain any five properties of refractones? (10) (ii) What are abrasives? How are they classified? Give one example for each. (6) OR 15. (b) (i) Give the structures of graphite and molybdenum disulphide. How do they function as lubricants? (8) (ii) Write a note on the applications of carbon nanotubes. (8) |
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