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May Jun 2014.pdf-Total No. of Questions : 8]
May_Jun_2014.pdf-Total No. of Questions : 8]
May Jun 2014.pdf-Total No. of Quest...
May_Jun_2014.pdf-Total No. of Questions : 8]
Page 1
Total No. of Questions : 8]
[Total No. of Pages : 3
F.E. (Semester - I & II)
ENGINEERING CHEMISTRY
(2012 Pattern)
Time :2 Hours]
[Max. Marks :50
Instructions to the students:
1)
Answer Q.1 or Q.2, Q.3 or Q.4 or Q.5 or Q.6 and Q.7 or Q.8.
2)
Neat diagrams must be drawn wherever necessary.
3)
Figures to the right side indicate full marks.
4)
Use of
lagarithmic table or electronic pocket Calculator is allowed.
5)
Assume Suitable data if necessary.
Q1)
a)
Describe Ion exchange method for softening of hard water.
[6]
b)
What is reference electrode? Draw neat labeled diagram of Glass electrode
and give its representation.
[3]
c)
Explain conductometric titration curve for reaction between weak acid
and strong base.
[3]
OR
Q2)
a)
Explain different types of electronic transitions occurring in organic
molecules on absorption of UV-visible radiations.
[6]
b)
Define caustic embrittlement. Give causes and prevention of caustic
embrittlement in boiler.
[3]
c)
A water sample is not alkaline to phenolphthalein. However 100 ml of
water sample on titration with N/50 HCI required 16.9 ml of acid to
get methyl orange end point. Identify the type and determine the extent
of alkalinity.
[3]
SEAT No. :
P1959
P.T.O.
Page 2
2
Q3)
a)
Define addition polymerization. Explain free radical reaction mechanism
with suitable example.
[6]
b)
What is power alcohol? Give its preparation with reactions and any
two disadvantages.
[3]
c)
A coal sample contains C: 80%, H: 10%, S: 2.5%, N:4% and remaining
is ash. Calculate the theoretical quantity of oxygen and air required for
complete combustion of 1 Kg of given coal sample.
[3]
OR
Q4)
a)
What is proximate analysis? Explain the procedure for determination
of each constituent with its formula.
[6]
b)
Distinguish between LDPE and HDPE (any four Points).
[3]
c)
Give preparation reaction, properties and uses of SBR.
[3]
Q5)
a)
Explain manufacturing of hydrogen gas by steam reforming of
i)
methane and
ii)
coke.
[5]
b)
Explain the structural features of fullerene with diagram and give its
applications.
[4]
c)
Explain the isotopes of carbon with their applications.
[4]
OR
Q6)
a)
Explain structural features and applications of diamond and graphite.
[5]
b)
Explain difficulties in storage and transportation of hydrogen.
[4]
c)
What are different types of hydrides? Give preparation reaction of
germane, silane and lithium hydride.
[4]
Page 3
3
Q7)
a)
What is Pilling-Bedworth ratio? Give four types of oxide films formed
on surface of metal with suitable example.
[5]
b)
Explain galvanization with neat labeled diagram to protect Iron from
corrosion.
[4]
c)
What is the principle of Cathodic protection? Explain it with any one
method.
[4]
OR
Q8)
a)
Explain wet corrosion with H
2
evolution and O
2
absorption mechanism.
[5]
b)
Distinguish between anodic and cathodic coatings.
[4]
c)
Discuss factors affecting rate of corrosion, two each, for nature of metal
and nature of environment.
[4]
,,,
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