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Saturday, 8 October 2016

Engineering Chemistry- Model question paper for B.E/B.Tech

1(a) Explain the construction and working of a glass electrode. Mention their advantages and disadvantages. (06 marks)
(b) Define a concentration cell. Explain the working of a concentration cell. (04 Marks)
(c) Define emf of a cell. How is it determined? (04 Marks)
(d) A concentration cell is constructed by dipping copper rods in 0.001 m and 0.1 M CuSO4 solutions. Calculate the emf of the cell at 298 K. (04 Marks).
2 (a) Explain the construction of lead sorage battery. Write the discharging and charging reactions. (06 Marks)
(b) What are supercapacitors? Explain their working. What are their advantages? (06 Marks)
(c) Explain electrochemical theory of corrosion. (04 marks)
(d) What are the differences between sacrificial anode method and impressed current method of cathodic protection? What are the limitations of impressed current method. (04 Marks)
3 (a) Give an account of electroless plating of nickel and copper. What are the applications? (06 Marks)
(b) What is decomposition potential? How is it determined? What is its significance in electrolysis? (06 Marks)
(c) What are the characteristics of a good deposit? (04 Marks)
(d) Explain the methods of cleaning a metal surface prior to plating. (04 Marks)
4 (a) What is meant be cracking? Describe with a neat diagram, fluidized bed cracking method. (06 Marks)
(b) What is biodiesel? How is it prepared? What are the advantages? (06 Marks)
(c) Differentiate between direct solar power utilization and indirect solar power utilization. (04 Marks)
(d) Write a note on physical and chemical properties of silicon relevant to photovoltaics. (04 Marks)
5 (a) What are lower critical temperature and upper critical temperature lines with respect to iron carbon phase diagram. (04 Marks)
(b) Differentiate between true equilibrium and metastable equilibrium. (04 Marks)
(c) Explain the principle of potentiometric titration. How is the end point located? (06 Marks)
(d) State Beer’s law and Lambert’s law. Derive the mathematical expression for Beer-Lambert’s law. (06 Marks)
6 (a) Define monomer, polymer and functionality with examples. (06 Marks)
(b) Thermal control is rather difficult in bulk polymerization. Explain. (04 Marks)
(c) Classify the polymers on the basis of mechanism of polymerization. (06 Marks)
(d) Explain the methods of polymer moulding. (04 Marks)
7(a) Give a brief account of glass transition temperature. (04 Marks)
(b) What are conducting polymers? Explain. (04 Marks)
(c) What are elastomers? Write the structure for natural rubber and gutta percha. What are the differences between them? (08 Marks)
(d) Write a note on nanocomposites. (04 Marks)
8(a) Why does the sewage need treatment? Explain the primary, secondary and tertiary treatment methods for sewage. (08 Marks)
(b) Explain the treatments given to water for municipal supply. (04 Marks)
(c) What are the impurities present in water? (04 Marks)
(d) What are the characteristics of potable water? (04 Marks)

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