Download VTU ((Visvesvaraya Technological University) B.E/B-Tech 2019 July ( Bachelor of Engineering) First & Second Semester (1st Semester & 2nd Semester) 18 Scheme 18CHE12 Engineering Chemistry Question Paper
Society
ENNO11111
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of E"
First/Second Semester B.E. Degree Examination, June/July 2019
Engineering Chemistry
Time: 3 hrs.
Max. Marks: 100
Note: Answer any FIVE full questions, choosing ONE full question from each module.
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Module-1
Ta
P
1 a. What is single electrode potential? Derive Nernst's equation for single electrode potential.
64 (06 Marks)
b. What are batteries? Demonstrate the construction and working of Ni-MH battery, mention
,.. v its applications. (07 Marks)
vi
,..) ..0
eo
c. What voltage will be generated by a cell that consists of an iron electrode immersed in 0.5M
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=
FeSO4 solution and a copper electrode immersed in 1M CuSO4 solution at 298 K. Given
.--
_,,,- vn
1 d;
E;', = ?44 V and P
o
, = 0.34 V. Write the cell representation and cell reactions. (07 Marks)
ii
5
.
9
cc
? - ,:: +
i ?4- " OR
E a
V. 4)
2 a. What is Battery? Explain primary and secondary with examples. (06 Marks)
41 '-':
=
I)
b. Describe the construction and working of Li-ion battery. Mention its applications. (07 Marks)
- .E
.
'6 -, .... c. What are concentration cells? Emf of the cell Cd I CdSO4 (XM) I I CdSO4 (0.025M) I Cd
tu
0
ti:
,-. =
at 28?C is 0.035 V. Find the concentration of CdSO4 at anode. Given R = 8.314 J/K/mol,
...
? _
1-4
F = 96500 C. (07 Marks)
' =
t- cr
U a.)
Ts
0
0 Module-2
"1:3
tt) C
cd 01 3 a. Discuss the following types of corrosion:
t- .. s
i) Differential metallic corrosion ii) Water line corrosion (06 Marks)
cz =
-5 73'
b. What is corrosion? Illustrate electrochemical theory of corrosion taking iron as an example.
, t >
(07 Marks)
S. C I
0
,,, ?-, c. What is electroless plating? Outline the electroless plating of copper.
4-.
-
a 8;
(07 Marks)
o... ta.
P c..
'
0
OR
-9
4 a. Explain the factors affecting the rate of corrosion:
13
i) Nature of corrosion product ii) Ratio of anodic to cathodic areas (06 Marks)
? !1
1
:'
cz t'
b. What is meant by metal finishing? Highlight any five technological importance of metal
>, finishing.
(07 Marks)
o
co
= to
c. What is electroplating? Discuss the electroplating of chromium. (07 Marks)
=
F.-tu
'7. ,?
Module-3
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5 a. What are fuel cells? Describe the construction and working of Methanol-Oxygen fuel cell.
r.;
(06 Marks)
b. Describe the experimental determination of calorific value of solid fuel using Bomb
Z'
Calorimeter.
(07 Marks)
? E' 1-1 c. 0.95 g of coal sample (C = 93%; H2 = 6% and ash 1%) was subjected to combustion in
O
Bomb calorimeter. Mass of water taken in the calorimeter was 2.6 kg and the water
t
F1-
equivalent of calorimeter was 0.75 kg. The rise in temperature was found to be 3.2?C.
Calculate the gross and net calorific values of the sample. Latent heat of
steam = 2457 kJ/kg/?C and S = 4.187kJ/kg/?C. (07 Marks)
USN
18CHE12/22
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? _
Society
ENNO11111
W ?
of E"
First/Second Semester B.E. Degree Examination, June/July 2019
Engineering Chemistry
Time: 3 hrs.
Max. Marks: 100
Note: Answer any FIVE full questions, choosing ONE full question from each module.
U
....
t;
cz
0. "
Module-1
Ta
P
1 a. What is single electrode potential? Derive Nernst's equation for single electrode potential.
64 (06 Marks)
b. What are batteries? Demonstrate the construction and working of Ni-MH battery, mention
,.. v its applications. (07 Marks)
vi
,..) ..0
eo
c. What voltage will be generated by a cell that consists of an iron electrode immersed in 0.5M
? ?
=
FeSO4 solution and a copper electrode immersed in 1M CuSO4 solution at 298 K. Given
.--
_,,,- vn
1 d;
E;', = ?44 V and P
o
, = 0.34 V. Write the cell representation and cell reactions. (07 Marks)
ii
5
.
9
cc
? - ,:: +
i ?4- " OR
E a
V. 4)
2 a. What is Battery? Explain primary and secondary with examples. (06 Marks)
41 '-':
=
I)
b. Describe the construction and working of Li-ion battery. Mention its applications. (07 Marks)
- .E
.
'6 -, .... c. What are concentration cells? Emf of the cell Cd I CdSO4 (XM) I I CdSO4 (0.025M) I Cd
tu
0
ti:
,-. =
at 28?C is 0.035 V. Find the concentration of CdSO4 at anode. Given R = 8.314 J/K/mol,
...
? _
1-4
F = 96500 C. (07 Marks)
' =
t- cr
U a.)
Ts
0
0 Module-2
"1:3
tt) C
cd 01 3 a. Discuss the following types of corrosion:
t- .. s
i) Differential metallic corrosion ii) Water line corrosion (06 Marks)
cz =
-5 73'
b. What is corrosion? Illustrate electrochemical theory of corrosion taking iron as an example.
, t >
(07 Marks)
S. C I
0
,,, ?-, c. What is electroless plating? Outline the electroless plating of copper.
4-.
-
a 8;
(07 Marks)
o... ta.
P c..
'
0
OR
-9
4 a. Explain the factors affecting the rate of corrosion:
13
i) Nature of corrosion product ii) Ratio of anodic to cathodic areas (06 Marks)
? !1
1
:'
cz t'
b. What is meant by metal finishing? Highlight any five technological importance of metal
>, finishing.
(07 Marks)
o
co
= to
c. What is electroplating? Discuss the electroplating of chromium. (07 Marks)
=
F.-tu
'7. ,?
Module-3
O ?
5 a. What are fuel cells? Describe the construction and working of Methanol-Oxygen fuel cell.
r.;
(06 Marks)
b. Describe the experimental determination of calorific value of solid fuel using Bomb
Z'
Calorimeter.
(07 Marks)
? E' 1-1 c. 0.95 g of coal sample (C = 93%; H2 = 6% and ash 1%) was subjected to combustion in
O
Bomb calorimeter. Mass of water taken in the calorimeter was 2.6 kg and the water
t
F1-
equivalent of calorimeter was 0.75 kg. The rise in temperature was found to be 3.2?C.
Calculate the gross and net calorific values of the sample. Latent heat of
steam = 2457 kJ/kg/?C and S = 4.187kJ/kg/?C. (07 Marks)
USN
18CHE12/22
18CHE12/22
OR
6 a. Explain the preparation of solar grade silicon by union-carbide process. (06 Marks)
b. What are pv-cells? Illustrate the construction and working of a typical pv-cell. (07 Marks)
c. What is knocking? Explain the mechanisms of knocking. Mention its ill effects. (07 Marks)
Module-4
7 a. Outline the softening of water by ion-exchange method. (06 Marks)
b. What are the sources, effects and control of lead pollution? (07 Marks)
c. Define COD. In a COD test, 30.6 cm
3
and 15.5 cm' of 0.05N FAS solution are required for
blank and sample titration respectively. The volume of the test sample used was 25 cm
3
.
Solve the COD of the water sample solution. (07 Marks)
OR
8 a. What is Desalination? Describe the process of reverse osmosis of water.
b. What is boiler corrosion? Explain the boiler corrosion with CO2, 02 and Mgaz.
c. Define COD. Illustrate the determination of COD of waste water sample.
Module-5
9 a. Describe the synthesis of nano-material by sol-gel technique.
b. Discuss the theory and instrumentation of conductometry.
c. Outline the theory, instrumentation and applications of colorimetry.
(06 Marks)
(07 Marks)
(07 Marks)
(06 Marks)
(07 Marks)
(07 Marks)
OR
10 a. Explain size dependent properties of nano material:
i) Surface area
ii) Electrical
iii) Optical properties (06 Marks)
b. Write a note on fullerenes. Mention its properties and applications. (07 Marks)
c. What are nanomaterials? Explain the synthesis of nanomaterial by chemical vapour
deposition method.
e)C tety
?
(07 Marks)
?
7
,4
2.
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This post was last modified on 01 January 2020