Download VTU BE 2020 Jan Question Paper 18 Scheme CHE1222 Engineering Chemistry First And Second Semester

USN CHE12/22

First/Second Semester B.E. Degree Examination,

Engineering Chemistry

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Time: 3 hrs.

Max. Marks: 100

Note: Answer any FIVE full questions, choosing ONE full question from each module.

Module-1

1. 1. Define Free Energy. Derive Nernst equation for single electrode potential. (07 Marks)

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   2. What are Reference Electrodes? Describe the construction and working of Calomel electrode. (06 Marks)
   3. Explain the construction and working of Ni — Metal Hydride battery. Give the reaction during charging and discharging mode. Give any two applications (07 Marks)

OR

2. 1. Describe the construction and working of Lithium — ion battery. Give its applications. (07 Marks)

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   2. Write a note on Primary, Secondary and Reserve batteries. (06 Marks)
   3. What are Concentration Cells? EMF of the cell Ag/AgNO3(C1) // AgNO3 (C 2 = 0.2m) / Ag is 0.8V Calculate C1 of the cell. (07 Marks)

Module-2

3. 1. What is Corrosion? Explain the Electrochemical theory of corrosion by taking iron as an example. (07 Marks)

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   2. Explain i) Differential Metal Corrosion ii) Pitting Corrosion. (07 Marks)
   3. What do you mean by metal finishing? Mention any five technological importances. (06 Marks)

OR

4. 1. Define and explain two terms: ⅰ) Polarisation ii) Decomposition potential iii) Over voltage. (06 Marks)

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   2. What is Electroless Plating? Explain the Electroless plating of copper. (07 Marks)
   3. Explain the process of Galvanization. (07 Marks)

Module-3

5. 1. What is Knocking? Explain the mechanism. (07 Marks)

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   2. On burning 0.96 grams of solid fuel in bomb calorimeter the temperature of 3500 grams of water increased by 2.7°C water equivalent of calorimeter and latent heat of steam are 385 grams and 587 cal/gram respectively. if the fuel contains 5% H2, calculate its gross and net calorific value. Specific heat of water = 4.187 kJ/kg K. (06 Marks)
   3. What are Fuel Cells? Describe the construction and working of CH3OH – 02 fuel cell. (07 Marks)

OR

6. 1. What are Solar Cells? Explain the construction and working of a typical P.V. Cell. (07 Marks)

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   2. Explain the production of solar grade Si by Union Carbide Process. (07 Marks)
   3. Write a note on : i) Power alcohol ii) Unleaded petrol. (06 Marks)

18CHE12/22

Module-4

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7. 1. What are the main sources, effects and control of lead pollution? (07 Marks)
   2. Mention the various causes, effects and disposal methods of e waste. (07 Marks)
   3. 50 mC of an industrial sewage has consumed 11.5 mf of 0.4N K 2Cr2O7 solution for complete oxidation. Calculate C.O.D of industrial sewage. (06 Marks)

OR

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8. 1. Explain the activated sludge treatment of sewage water (07 Marks)
   2. What is Desalination? Describe the desalination of seawater by reverse Osmosis process. (07 Marks)
   3. Write a note on Ozone depletion. (06 Marks)

Module_5

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9. 1. Explain the theory, Instrumentation and Application of Calorimetry. (06 Marks)
   2. What is Potentiometric titration? Explain the principle involved in Potentiometric titration. (07 Marks)
   3. Write a note on Fullerene. Mention its application. (07 Marks)

OR

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10. 1. What are Nano – materials? Give their synthesis by Sol - gel techniques. (07 Marks)
    2. Write a note on Graphenes. Mention their applications. (07 Marks)
    3. Explain the theory and applications of Atomic Absorption Spectroscopy. (06 Marks)

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