Download OU B-Tech First Year 2015 June 9005 Engineering Chemistry Question Paper

Download OU (Osmania University) B.Tech (Bachelor of Technology) First Year (1st Year) 2015 June 9005 Engineering Chemistry Question Paper

Code No. 9005 10
FACULTY OF ENGINEERING AND INFORMATICS
B.E. I - Year (Old) Examination, May / June 2015
Subject : Engineering Chemistry
Time : 3 hours
Max. Marks : 75
Note: Answer all questions from Part-A. Answer any FIVE questions from Part-B.
PART ? A (25 Marks)
1 Free energy change for a reaction involving two electrons in a cell is -125
kJ/mole. Calculate emf of the cell. 3
2 How can you predict the spontaneous nature of reaction from electrochemical
series.? 3
3 Carnot cycle operates between source temperature of 1'50
D
CJ, and sink
temperature of 50
?
C and absorbs 250 Joules of heat from source. '.Calculate the
work produced by carnot cycle.
3
4 Explain the importance of phase rule. 2
5 Explain the cause for prevention of corrosion of metalSbypaint. 2
6 What is the importance of calcium carbonate equivalent
,
in water chemistry and
define PPM? 3
7 How will you distinguish plastic from elastomer? 2
8 How are the silicone polymer chains cured :
,
or cross-linked? 2
9 Give the uses and composition of diesel-an petrol. 3
10 Give the principle of rocket propulsion 2
PART ? B (50 Marks)
11 a) Distinguish reversible cell .from irreversible cell with examples.
b) Give construction, half Cell hotation, Nernst equation and significance of
hydrogen electrode.
12 a) Describe Carnottheorem and give its significance.
b) Give the importance of free energy and drawback of entropy with derivation of
criteria for spontaneity and equilibrium in terms of these two.
13 a) Compare with examples and chemical reactions of galvanic corrosion with
differential aeration corrosion.
b) Explain the electroplating of Nickel.
14 a) Give the differences between thermoset and thermoplastic resins with
examples.
b) Give the preparation and applications of carbon nanotubes.
15 a) Explain with flow diagram of cracking by fixed bed catalytic cracking and its
significance.
b) Define and give the importance of octane number and cetane number.
16 Give the construction and chemical reactions during the operation of the cells as
given below
a) Methanol-oxygen fuel cell b) Nickel-cadmium battery
17 a) Discuss the phase diagram of water system with its significance.
b) Discuss the importance of breakpoint chlorination with graph in water
chemistry.
4
6
4
6
6
4
5
5
6
4
5+5
6
4
* **
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