STUPIDSID
1(a)
Write various units used for expression of hardness of water and show their interrelationship.
2 M
1(b)
What is boiler corrosion?
2 M
1(c)
Explain break point chlorination.
3 M
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.
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.
7 M
1(e)
Describe and distinguish the Zeolite and lime-soda processes of softening hard water.
7 M
2(a)
Distinguish clearly between peat, lignite and brown coals.
2 M
2(b)
Explain the process of reforming.
2 M
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.
3 M
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.
7 M
2(e)
What is carbonization? Point out the difference between carbonization and combustion. Also describe low and high temperature carbonization.
7 M
3(a)
What are solid lubricants? Give examples
2 M
3(b)
''Oils having high viscosity need not necessarily have high viscosity index''. Justify the comment.
2 M
3(c)
Write brief note on synthetic lubricants.
3 M
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.
7 M
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?
7 M
4(a)
What are thermoplastic and thermosetting plastic?
2 M
4(b)
Write characteristics of polymers.
2 M
4(c)
What are epoxy resins? Write important properties epoxy resins.
3 M
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?
7 M
4(e)
What is the difference between Nylon-6 and Nylon-6:6? Describe the method of synthesis of these using hydrocarbons.
7 M
5(a)
Explain Beer-Lambert's law.
2 M
5(b)
What is BOD and COD? What is their significance?
2 M
5(c)
Discuss the principles involved in gas chromatography.
3 M
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.
7 M
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
i) Alkalinity
ii) Hardness
iii) Chloride
iv) DO
v) BOD
vi) COD
7 M
More question papers from Engineering Chemistry