Engineering chemistry
Previous year question paper with solutions for Engineering chemistry Dec-2017
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Question paper 1
SECTION A
1. Compulsory Question:
a. How the intensity of the rotational spectral lines varies and why?Answer:
b. Are the lines in Rotational Raman Spectra equally spaced? Elaborate your answer.
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c. Write a short note on waterline corrosion.
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d. Discuss about supramolecular structures.
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e. What is meant by tacticity of polymers?
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f. Comment on the free energy change of photochemical reactions giving reasons.
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g. What is meant by first, second and third generation petrochemicals?
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h. How is Green Chemistry helpful in designing of safer chemicals?
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i. Describe the term priming and foaming in Water and its treatment.
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j. What do you understand by multiplicity of the state?
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SECTION B
2. State Lambert-Beer’s law. Derive its mathematical form. What are its limitations?
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3. Write a detailed note on construction, working and chemistry behind photovoltaic cell.
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4. With the help of a neat diagram, explain reverse osmosis method of desalination.
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5. Write a detailed note on use of innocuous reagents in natural processes with suitable examples.
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SECTION C
6. Discuss in details the causes of wet corrosion and the mechanism of wet corrosion with the help of chemical equations involved.
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7. How are polymer matrix composites and fiber reinforced plastics made?
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8. Describe in details "materials self-assembly".
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9. Write in details about primary raw materials for petrochemicals and Crude oil.
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Question paper 2
SECTION A
1. Compulsory Question:
a) Why do we express hardness of water in terms of CaCO3, equivalents?Answer:
b) What is meant by single electrode potential?
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c) What do you understand by reduced phase rule?
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d) Write a note on soil corrosion.
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e) What do you mean by spin-lattice relaxation in NMI?
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f) List the three criteria for phase equilibrium of a multi-component system.
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g) Why is it not possible to measure the limiting molar conductivity of a weak
electrolyte experimentally?Answer:
h) Define quantum yield. Give its mathematical expression.
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i) Discuss the principle behind liquid chromatography.
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j) Define B.O.D and C.O.D.
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SECTION B
2. What is boiler feed water? Explain the scale and sludge formation in boiler.
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3. Explain the mechanism of electrochemical corrosion with example.
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4. Explain the principle and working of TLC. List its important applications.
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5. What is liquid junction potential? Derive the expression for liquid junction potential.
How can it be minimized or eliminated?Answer:
SECTION C
6. What do you understand by luminescence? Briefly explain the different types of
luminescence.Answer:
7. What do you mean by resolving power of a spectrometer? Explain taking the example of a prism as the dispersing element. Also explain how the resolution depends upon slit width.
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8. How does absorption signal originate in NMR spectroscopy? What is meant by resonance in NMR spectroscopy.
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9. Derive the criteria for phase equilibria for a multi-component system. Deduce from it, the criteria for two phase equilibria for one component system.
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