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Nov Dec 2019.pdf-P.T.O. Total No. of Questions— 8
Nov_Dec_2019.pdf-P.T.O. Total No. of Questions— 8
Nov Dec 2019.pdf-P.T.O. Total No. o...
Nov_Dec_2019.pdf-P.T.O. Total No. of Questions— 8
Page 1
P.T.O.
Total No. of Questions—
8
]
[Total No. of Printed Pages—
4
Seat
No.
[5667]-104
F.E. EXAMINATION, 2019
ENGINEERING CHEMISTRY
(2015 PATTERN)
Time : Two Hours
Maximum Marks : 50
N.B.
:—
(
i
)
Neat diagrams must be drawn wherever necessary.
(
ii
)
Figures to the right indicate full marks.
(
iii
)
Use of logarithmic tables, slide rule, Mollier charts, electronic
pocket calculator and steam tables is allowed.
(
iv
)
Assume suitable data, if necessary.
1.
(
a
)
Explain boiler corrosion giving causes, reactions involved and
preventive measures taken.
[6]
(
b
)
Explain conductometric titration between weak acid and strong
base with the help of titration curve and reaction.
[3]
(
c
)
Describe the construction of glass electrode with figure and
half cell representation.
[3]
Or
2.
(
a
)
Draw a labelled block diagram of single beam spectrophotometer
and explain the components involved.
[6]
(
b
)
Explain any
three
principles of green chemistry with relevant
examples.
[3]
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CEGP013091
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CEGP013091
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Page 2
[5667]-104
2
(
c
)
100 ml of a hard water sample requires 18 ml of 0·01 M
EDTA solution. 100 ml of the same sample after boiling and
filtration required 7 ml of the same EDTA solution. Calculate
the total, temporary and permanent hardness of the water
sample.
[3]
3.
(
a
)
Explain the mechanism of free radical polymerization using suitable
example.
[6]
(
b
)
Explain how percentage moisture and percentage volatile matter
is determined in proximate analysis of coal.
[3]
(
c
)
The following observations were noted in a bomb calorimeter
experiment — Mass of coal sample = 1·708 g; weight of water
in calorimeter = 2000 g; water equivalent of calorimeter
= 580 g; initial temperature = 23·252°C; final temperature
= 26·773°C. Find the GCV of the coal sample. Also calculate
the NCV if given coal contains 5% hydrogen.
[3]
Or
4.
(
a
)
How is the percentage of carbon, hydrogen and sulphur determined
in ultimate analysis of coal ?
[6]
(
b
)
Differentiate between LDPE and HDPE with respect to preparation,
properties and applications.
[3]
(
c
)
Give the preparation, properties and applications of styrene-
butadiene rubber (SBR).
[3]
CEGP013091
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CEGP013091
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CEGP013091
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