Download VTU ((Visvesvaraya Technological University) B.E/B-Tech 2019 July ( Bachelor of Engineering) First & Second Semester (1st Semester & 2nd Semester) 2018 Jan 2017 Dec 17CHE12 Engineering Chemistry Question Paper
b.
AgNO,
calculate the value of X.
c. Write a note on: (i) Capacity (ii) Cycle life (iii) Voltage
OR
Define single Electrode Potential? Derive Nernst equation for single electrode.
What are concentration cells? The cell potential of Ag concentration cell,
Ag
(s)
(0.001M)(AgNO
3
(XM)/ Ag
(s)
is 0.0659 V at 25?C. Write the cell
USN L
17CHE12
First Semester B.E. Degree Examination, Dec.2017/Jan.2018
Engineering Chemistry
Time: 3 hrs. Max. Marks: 100
Note: Answer any FIVE full questions, choosing one full question from each module.
Module-1
1 a. What are reference electrodes? Describe the construction and working of Caloniel electrode,
mention the uses. (07 Marks)
b. Define Battery. Explain construction, working and uses ofNi-metal Hydride battery.
(07 Marks)
c. What are fuel cells? Explain the construction and work _ ing of Methanol oxygen cell.
(06 Marks)
(07 Marks)
reactions and
(07 Marks)
(06 Marks)
Module-2
3 a. Define corrosion. Explain electrochemical theory of corrosion by taking Iron as an example.
(07 Marks)
What is Anodizing? Explain anodizing of aluminium, mention uses. (07 Marks)
Define Electra less plating. What are the differences between ciectro plating and electroless
plating? (06 Marks)
OR
4 a. What is differential aeration corrosion? Explain pitting corrosion with anode and cathode
reactions. (07 Marks)
b. Define metal finishing? Explain electroplating of Nickel by Watt's bath, mention the uses.
(07 Marks)
c. What is cathodic protection? Explain the sacrificial anode method and impressed current
method. (06 Marks)
Module-3
5 a. Define GCV and NCV? How calorific value of a solid/liquid fuel is determined using bomb
colorimeter. (07 Marks)
b. Define octane and cetanc number? What is the objective of reforming of petrol and discuss
the various methods of reforming. (07 Marks)
c. What are solar cells? Describe the method of purification of silicon by zone refining.
(06 Marks)
1 of 2
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2 a.
b.
AgNO,
calculate the value of X.
c. Write a note on: (i) Capacity (ii) Cycle life (iii) Voltage
OR
Define single Electrode Potential? Derive Nernst equation for single electrode.
What are concentration cells? The cell potential of Ag concentration cell,
Ag
(s)
(0.001M)(AgNO
3
(XM)/ Ag
(s)
is 0.0659 V at 25?C. Write the cell
USN L
17CHE12
First Semester B.E. Degree Examination, Dec.2017/Jan.2018
Engineering Chemistry
Time: 3 hrs. Max. Marks: 100
Note: Answer any FIVE full questions, choosing one full question from each module.
Module-1
1 a. What are reference electrodes? Describe the construction and working of Caloniel electrode,
mention the uses. (07 Marks)
b. Define Battery. Explain construction, working and uses ofNi-metal Hydride battery.
(07 Marks)
c. What are fuel cells? Explain the construction and work _ ing of Methanol oxygen cell.
(06 Marks)
(07 Marks)
reactions and
(07 Marks)
(06 Marks)
Module-2
3 a. Define corrosion. Explain electrochemical theory of corrosion by taking Iron as an example.
(07 Marks)
What is Anodizing? Explain anodizing of aluminium, mention uses. (07 Marks)
Define Electra less plating. What are the differences between ciectro plating and electroless
plating? (06 Marks)
OR
4 a. What is differential aeration corrosion? Explain pitting corrosion with anode and cathode
reactions. (07 Marks)
b. Define metal finishing? Explain electroplating of Nickel by Watt's bath, mention the uses.
(07 Marks)
c. What is cathodic protection? Explain the sacrificial anode method and impressed current
method. (06 Marks)
Module-3
5 a. Define GCV and NCV? How calorific value of a solid/liquid fuel is determined using bomb
colorimeter. (07 Marks)
b. Define octane and cetanc number? What is the objective of reforming of petrol and discuss
the various methods of reforming. (07 Marks)
c. What are solar cells? Describe the method of purification of silicon by zone refining.
(06 Marks)
1 of 2
Module-5
9 a. What is Boiler Feed Water? Explain the differences between scale and sludge formation in
(07 Marks)
(07 Marks)
boiler.
What is desalination? Explain the desalination of sea water by electrodialysis.
hat are nano materials? Explain the synthesis of nano material by Sol.gel method.
(06 Marks)
OR
17CHE12
OR
6 a. A coal sample containing 92% C, 7% I+ and 3% Ash is subjected to combustion in a bomb
calorimeter. Calculate the Gross and Net calorific values. Given that mass of coal sample is
0.85x IV" kg, mass of water in copper calorimeter is 2 kg, water equivalent of calorimeter is
0.75 kg, rise in temperature of water is 2.5?C, latent heat of steam is 2454 ki/kg and specific
heat of water is 4.187 k.1/kg/C. (07 Marks)
b. Describe the:production of solar grade Si by union carbide process. (07 Marks)
c. Explain the construction and working of a PV cell. (06 Marks)
Module-4
7 a. What are polymers? Illustrate the mechanism of addition polymerization by taking vinyl
chloride as an example. (07 Marks)
b. Describe the manufacture of, (I) PMM A (ii) Kevlar. Mention the uses. (07 Marks)
c. Define addition and condensation polymerization process with one example each. (06 Marks)
OR
8 a. Define Glass Transition Temperature. Explain any three factors affecting Tg. (07 Marks)
b. What are Elastomers? Give the synthesis and applications of, (i) Silicone rubber
(ii) Epoxy resin. (07 Marks)
c. A polymer sample containing 50, 100 and 150 molecule h I i
t
tolar mass 2000 g/rnol,
2500 g/mol and 3000 g/mol respectively. Calculate the nu b average and weight average
molecular mass of polymer. (06 Marks)
10 a. Define COD and BOD. In COD test 25.5 cm
3
and 12.5 cm' of 0.05 N FAS solution are
required for blank and sample titration respectively. The volume of the test sample used is
26 cm
3
. Calculate the COD of the sample solution. (08 Marks)
b. Describe the synthesis of nano materials by chemical vapor condensation process. (06 Marks)
c. Write a note on CNT and Dendrimers. (06 Marks)
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This post was last modified on 01 January 2020