Bangalore University 2008 B.E 1st Semester EnggCheme/y (2K6 scheme) - Question Paper
1st Semester Engg. Chem. June/July 2008 (2K6 scheme) UJ - 1091
l/II. Semester 1J.E. Kxaminsitiou, Jimc/July 2008 (2K6 Scheme) ENGINEERING CHEMISTRY
Time: 3 Hours Max. Marks: 100
Instruction : Answer any 10 quf.xttons choosing five questions from each Pari.
PART - A
U j) Whai ac lon-sclcctivc clecuudcs ? Explain ilit* cnnstiuction and worl inj* tf glass electrode.
b) Explain the origin of single elccuodc poleini:tl. < -*)
JZ. a) Wh;ii;uv.scntieondoaors?l*xplaiutfiecoiiditviv!!.\ oi ui;i:isc * mioom nMots based on band theory of solid*.
b) Write a note on controlled valcnoy si:micniiluc:i<r;. ((*+4)
a) Whai are fuel cells ? What, are Che advantages of fuel cells ovpr batteries ?
b) Explain the construction, working and advantages of metlianol-oxygen fuel cell. ' (4+6)
_Ji'. a) What is metallic corrosion ? Explain elcctrochcniical theory of corrosion by taking ruscing of Iron as an example.
b) Explain the process of Anodisatiou. * (6--4)
/
a) Explain the construction and discharge reactions of Pb-Acid battery. Mention the applications.
b) Hxplain waterline corrosion with an example. (6+4)
I'.T.O.
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6. a) Kxplain the concept and advantages of Bio-catalysts.
b) Give the synthesis of vitamin C. (6-
\_3. a) Explain the following factors affecting the role of corrosion
i) ratio of anodic and cathodie areas.
ii) nature of Corrosion product
iii) pH.
b) Give the synthesis of ibuprofcn. (6+4
PART - B
'Ji' a) Discuss the reformation of petrol with relevant reactions.
b) What is knocking of petrol ? llXplain tl\-mechanisms of knocking. (<>+*)
<Ai. a) Define cicctroless plating, Explain electroiess plating of Cu on PCB.
b) Write a note on decomposition potential. (6+4)
a) Distinguish between thermoplastics and themio sotting plastics.
I>) How aiv the following plastics prepared and mention their uses.
i) Teflon
ii) Potycartwnales
ii ) LOl'Ki. (4+6)
U. a) What arc the deficicncics of natural rubber ? How Bura-S is prepared ? Give its uses. '
b) Write a note on Vulcanisation of rubber. (6+4)
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J-2. a) Explain the following plating variables on clectrodeposit'; :
i) Organic additives
ii) Cement Density rii) TrQughing power.
b) Explain electroplating of Cr. (0 4-4)
13. a) What are conducting polymers ? Explain the mechanism 'of conduction in polyacctvlcnc.
b) Write note on High Te super conductors.* (Cn 4)
a) 'Define photovoltaic cell. Explain the consirticiton. working and mechuMiri.s ol' photovoltaic ccll.
b) Write a noicon toweralcohol. (6+4)
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