Biju Patnaik University of Technology 2008-4th Sem B.Tech (B Tech) , chemistry -II . - Question Paper
BPUT(B Tech) , fourth semester chemistry -II ques. paper.
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Totaf number ol printed pages 7 g Tech
BSCC 2201
Fourth Semester Examination - 2008 CHEMISTRY - II Fuil Marks - 70
Time: 3 Hours
Answor Question No. 1 which is compulsory and any five from the rest.
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The figures in the right-hand margin indicate marks. -
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1. Answer in brief: 2x10
(a) Why do we add buffer solution in ihe titration of hard water against EDTA ? Which buffer is used 7
(b) Is water softened by zeolite process suitable to be used "in boilers 7 Expiai-
(c) How can anti-knock properties of fuel be improved ?
(d) Wihat are the main characteristics of a diesel engine fuel ?
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(ej What are the importances ot oxygen in coal ?
(f) Why is slight warming effect observed when a rubber band is stretched ?
(g) Can all simple organic molecules produce polymer ? Give reasons to your answer.
(h) What is sewage ?
BSCC 2201 2 Contd.
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(t) What is green house effect ?
(j) Which type of metal oxide film is desirable in corrosion prevention ?
2. (a) Compare between1 liquid fuel and gaseous
iuel. 3
(b) Explain why coke is preferred to coal for "metallurgical purpose. 2
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(c) Differentiate between low temperaitireand high temperature carbonization. Discuss about the beehive oven method. 5
3. (a) What is cracking ? What are the advan
tages of catatytic cracking over thermal
cracking ? 4
BSCC 2201 3 PT*-
(b) What is .LPG ? What are its advantages over other fuels ? What are its limitations?
(c) Why is calorific value of coal gas more
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than that of producer gas ? 2
4, (a) What are the disadvantages of scale formation ? Discuss about various internal treatment methods for prevention of scale IWL
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formation. 5
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(tf) What are priming and foaming ? How j
can they be avoided ? 2
(c) How can dissolved oxygen be removed lo avoid boiler corrosion ? 3
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5. (a) Describe lime soda process What are the advantages and disadvantages of the process ? 5
(b) 10,000 litres of hard water was treated with zeolite. The exhausted zeolite required a total amount of 9 litres of NaCf solution containing 120 grams / litre of NaCI for regeneration. Calculate the hardness of water, 3
(c) Why is boiled water not always 100% safe for drinking purpose ? 2
6, (a) Distinguish between thermo-plastic and
thermo-selling ptastic, 3
BSCC 2201 5 p-T-0'
(b) Discuss the method ol manufacturing and uses of nylon 6. 3
(c) Why does natural rubber require vulcanization ? Explain vulcanization of rubber.
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7. (a) Why are galvanized container not used
for storage of food products while (in coated ones are used ? 2
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(b) Discuss how proper designing of equipments prevents corrosion, 4
(c) Discuss about stress corrosion. 4
8. {a) How does the atmospheric ozone depletion
occur ? What are its effects ? 4 BSCC 2201 5 Contd,
(b) How are COD and BOD experimentally determined ? 3
(c) What is meant by air pollution ? Explain the control of air pollution by an electrostatic precipitator with a neat diagram. 3
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BSCC 2201
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