Download VTU ((Visvesvaraya Technological University) B.E/B-Tech 2019 July ( Bachelor of Engineering) First & Second Semester (1st Semester & 2nd Semester) 2015 June-July 14CHE12 Engineering Chemistry Question Paper
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14CHE12/22
First/Second Semester B.E. Degree Examination, June/July 2015
0
0
Time: 3 hrs.
Note: Answer FIVE questions, selecting
Engineering Chemistry
ONE full question from each part.
"CS
Max. Marks:46)
i
v
e
Define reference electrode. Explain the measureme tf standard electrode potential using
,
Calomel electrode. (05 Marks)
A cell is obtained by combining two Cd electron es immersed in cadmium sulphate solutions
of 0.1M and 0.5M at 25?C. Give the cell repregentation, cell reaction and calculate EMF of
(05 Marks)
? Air battery.
(05 Marks)
f methanol ? oxygen fuel cell. Mention any two
(05 Marks)
? -, 1 li l
,, _ J
? -'
,-.
?
.,
I 11
i) current ii) metal ion concentration iii) throwing power. (05 Marks)
/ -,,,
.0 ....
? 2 5 \
-4 5 4 How does the follo*ng factor affect the rate of corrosion?
cd ct
3 A. What is stress
tti 0
g
reactions.
.... s
i) Nature of corrosion product. ii) Temperature ii) pH. (05 Marks)
c4'
?.. t,
O d
d. Explain .rocess of electroplating of chromium for engineering applications. Indicate the
.... ., 2
reas r not employing chromium as anode. (05 Marks)
c. Explain the f i lowing factors influencing rate of electro ? deposit.
,--?, ii
4 a. at is cathodic protection? Explain sacrificial anodic method and impressed current
?? t-
o
-
ethod.
(05 Marks)
..
on
O ob
.r... .5 Explain the electro chemical theory of corrosion by taking iron as an example. (05 Marks)
7 ?,,
0
? "Ei. g '
Write a short note on
a t ,&%.
Q ..._.
i) polarisation ii) Decomposition potential (05 Marks) 60*. ii, it
? .., = FAO
,
eAr
s
'
d. Explain the process of electroless plating of copper on PCB. (05 Marks)
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__}
? . -
-8
PART ? C
5 a. On burning 1.15g of a coal sample in a bomb calorimeter, the temperature of 3.5kg of water
1
in the calorimeter increased from 26.5?C to 28.5?C. Water equivalent of calorimeter is 325g.
rAu
Specific heat of water 4.187k]Ikg1
?
C . Latent heat of steam = 587 CaUg. If the fuel contains
4% hydrogen, calculate gross and net calorific values. (05 Marks)
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USN
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-=
C.)
0
.
PART?A
r) xl
-a
e
1 a. Explain the construction and working of glass electrode. - N (05 Marks)
01
1
b. Give the construction of calomel electrode. Justify that it is a rever
c. Discuss the construction and working of Li ? Mn02 battery. G.t."
lectrode. (05 Marks)
(05 Marks)
O
ki
{,i
0 d. What are fuel cells? How is it different from galvanic cell? Alegtibn any two advantages of
.,
?
:,
? ? fuel cell.
bi
(05 Marks)
120
O
..4
tZt. 3 =I
0
ii
to
,,,
f-Th a -4. b.
b i
l
O 4 1 the cell.
0
c. Describe the construction and workin
O 2
.c
. ... 0
d. Explain the construction and wor
?
(
0
PART ?B
corrosionft
,
Explain stress corrosion in boilers due to alkali with
oi
c
5
h
m
eini
ar
c
ics
a
)
l
t
4
applications.
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1 of 2
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RDF
o
r"Th,
14CHE12/22
First/Second Semester B.E. Degree Examination, June/July 2015
0
0
Time: 3 hrs.
Note: Answer FIVE questions, selecting
Engineering Chemistry
ONE full question from each part.
"CS
Max. Marks:46)
i
v
e
Define reference electrode. Explain the measureme tf standard electrode potential using
,
Calomel electrode. (05 Marks)
A cell is obtained by combining two Cd electron es immersed in cadmium sulphate solutions
of 0.1M and 0.5M at 25?C. Give the cell repregentation, cell reaction and calculate EMF of
(05 Marks)
? Air battery.
(05 Marks)
f methanol ? oxygen fuel cell. Mention any two
(05 Marks)
? -, 1 li l
,, _ J
? -'
,-.
?
.,
I 11
i) current ii) metal ion concentration iii) throwing power. (05 Marks)
/ -,,,
.0 ....
? 2 5 \
-4 5 4 How does the follo*ng factor affect the rate of corrosion?
cd ct
3 A. What is stress
tti 0
g
reactions.
.... s
i) Nature of corrosion product. ii) Temperature ii) pH. (05 Marks)
c4'
?.. t,
O d
d. Explain .rocess of electroplating of chromium for engineering applications. Indicate the
.... ., 2
reas r not employing chromium as anode. (05 Marks)
c. Explain the f i lowing factors influencing rate of electro ? deposit.
,--?, ii
4 a. at is cathodic protection? Explain sacrificial anodic method and impressed current
?? t-
o
-
ethod.
(05 Marks)
..
on
O ob
.r... .5 Explain the electro chemical theory of corrosion by taking iron as an example. (05 Marks)
7 ?,,
0
? "Ei. g '
Write a short note on
a t ,&%.
Q ..._.
i) polarisation ii) Decomposition potential (05 Marks) 60*. ii, it
? .., = FAO
,
eAr
s
'
d. Explain the process of electroless plating of copper on PCB. (05 Marks)
,-:. ri
__}
? . -
-8
PART ? C
5 a. On burning 1.15g of a coal sample in a bomb calorimeter, the temperature of 3.5kg of water
1
in the calorimeter increased from 26.5?C to 28.5?C. Water equivalent of calorimeter is 325g.
rAu
Specific heat of water 4.187k]Ikg1
?
C . Latent heat of steam = 587 CaUg. If the fuel contains
4% hydrogen, calculate gross and net calorific values. (05 Marks)
0
USN
o
ti
O
-=
C.)
0
.
PART?A
r) xl
-a
e
1 a. Explain the construction and working of glass electrode. - N (05 Marks)
01
1
b. Give the construction of calomel electrode. Justify that it is a rever
c. Discuss the construction and working of Li ? Mn02 battery. G.t."
lectrode. (05 Marks)
(05 Marks)
O
ki
{,i
0 d. What are fuel cells? How is it different from galvanic cell? Alegtibn any two advantages of
.,
?
:,
? ? fuel cell.
bi
(05 Marks)
120
O
..4
tZt. 3 =I
0
ii
to
,,,
f-Th a -4. b.
b i
l
O 4 1 the cell.
0
c. Describe the construction and workin
O 2
.c
. ... 0
d. Explain the construction and wor
?
(
0
PART ?B
corrosionft
,
Explain stress corrosion in boilers due to alkali with
oi
c
5
h
m
eini
ar
c
ics
a
)
l
t
4
applications.
g
1 of 2
b. Explain synthesis of petrol by Fischer Tropseh process. (05 Marks)
c. Discuss the construction and working of a photovoltaic cell. (05 Marks)
d. Explain the production of solar grade silicon by Union ? Carbide process. (05 Mats)
6 a. Define octane number. Explain reformation of petrol with equations. ?
b. What is biodiesel? How is it prepared? What are the advantages? k 1
64
arks)
c. What is doping? Explain doping of Si by diffusion Technique. ("). 5 Marks)
d. Explain the designing of PV cells ? Module, panel and Array. PV
.#
(05 Marks)
P-
(e
)
CN
?
PART ?13
7 a. Explain the radical mechanism of polymerisation taking vinylz +pride as a monomer.
(06 Marks)
b. Differentiate addition and condensation polymerisation.
$ 3
(04 Marks)
c. Give the synthesis reaction of Teflon and polycarbonate. (04 Marks)
d. Discuss the synthesis, properties and applications of epo in. (06 Marks)
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14CHE12/22
S a. Explain the following structure property relationship *polymers.
i) Crystalinity ii) Elasticity iii) Plaltiodefonnation.
--'
b. Explain the following factors influencing the TI,
,
i) Flexibility ii) Branching and cross
-
linking (04 Marks)
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,
c. Explain the synthesis of carbon fibre.
,
(04 Marks)
d. What is conducting polymer? Explain,
:
the mechanism of conduction in polyaniline and give
Ick(Qf
(06 Marks)
..- .
-ad'
lakili?
0 PART ?E
to i
I
a. What is boiler feed wat xplain the priming and foaming in boilers. (05 Marks)
b. Define COD. Disco Experimental determination of COD of waste water. (05 Marks)
c. What is nano ma,te_vial? Discuss the synthesis of nano material by gas condensation and
precipitation methods. (05 Marks)
d. Write a note:Zift carbon nano tubes.
(05 Marks)
10 a. Expl e activated sludge treatment of sewage water. (05 Marks)
b. the Desalination of sea water by reverse osmosis. (05 Marks)
c. ` 1q) ain the synthesis of nanomaterials by hydro thermal process.
(05 Marks)
d rite a note on Dendrimers.
(05 Marks)
Nr\
t\
A
Az.
0
IA I
(06 Marks)
the applications.
2 of 2
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