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Question Paper: Engineering Chemistry Question Paper - December 2015 - First Year Engineering (Set A) (Semester 1) - Rajiv Gandhi Proudyogiki Vishwavidyalaya (RGPV)
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Engineering Chemistry - December 2015

RGPV First Year Engineering (Set A) (Semester 1)

Total marks: --
Total time: --
INSTRUCTIONS
(1) Assume appropriate data and state your reasons
(2) Marks are given to the right of every question
(3) Draw neat diagrams wherever necessary
1(a) Write various units used for expression of hardness of water and show their interrelationship. 2 marks

1(b) What is boiler corrosion? 2 marks

1(c) Explain break point chlorination. 2 marks

Solve any one question from Q.1(d) &Q.1(e)

1(d) i) Write the chemical reactions involved in lime-soda process.
ii) Calculate lime and soda needed for softening of 105 litres of water containing MgSO4 = 12.0 mg/l; Mg(HCO3)2 = 14.6 mg/l; CaCl2 = 22.2 mg/l; Nacl=5.85 mg/l.
2 marks

1(e) Describe and distinguish the Zeolite and lime-soda processes of softening hard water. 2 marks

2(a) Distinguish clearly between peat, lignite and brown coals. 2 marks

2(b) Explain the process of reforming. 2 marks

2(c) Calculate the amount of minimum air required for complete combustion of 1 kg of coal sample containing C = 75%; H=5.2%; O=12.1%; N=4.5% and remaining ash. 2 marks

Solve any one question from Q.2(d) &Q.2(e)

2(d) What is cracking and for what it is used? What are the types of cracking? Describe the working the working of fluid bed catalytic cracking unit. 2 marks

2(e) What is carbonization? Point out the difference between carbonization and combustion. Also describe low and high temperature carbonization. 2 marks

3(a) What are solid lubricants? Give examples 2 marks

3(b) ''Oils having high viscosity need not necessarily have high viscosity index''. Justify the comment. 2 marks

3(c) Write brief note on synthetic lubricants. 2 marks

Solve any one question from Q.3(d) &Q.3(e)

3(d) Why viscosity is an important property of lubricants? What are the methods to determine viscosity? Explain any one method. 2 marks

3(e) What are the factors which are to be considered while selecting a lubricant for a particular purpose? How can we obtained lubricants from crude oil? 2 marks

4(a) What are thermoplastic and thermosetting plastic? 2 marks

4(b) Write characteristics of polymers. 2 marks

4(c) What are epoxy resins? Write important properties epoxy resins. 2 marks

Solve any one question from Q.4(d) &Q.4(e)

4(d) What is natural rubber? What do you understand by compounding of rubber? Name the ingredients used in compounding rubber. What are their function? 2 marks

4(e) What is the difference between Nylon-6 and Nylon-6:6? Describe the method of synthesis of these using hydrocarbons. 2 marks

5(a) Explain Beer-Lambert's law. 2 marks

5(b) What is BOD and COD? What is their significance? 2 marks

5(c) Discuss the principles involved in gas chromatography. 2 marks

Solve any one question from Q.5(d) &Q.5(e)

5(d) Discuss the origin of ultraviolet spectra and explain the working of UV spectrometer. Write important applications of UV-spectroscopy. 2 marks

5(e) Briefly describe the methods used for the analysis of the following parameters in water and waste water:
i) Alkalinity
ii) Hardness
iii) Chloride
iv) DO
v) BOD
vi) COD
2 marks

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written 11 days ago by gravatar for PonnuPriya PonnuPriya0
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