Download OU B-Tech First Year 2015 June 9358 Engineering Chemistry Question Paper

Download OU (Osmania University) B.Tech (Bachelor of Technology) First Year (1st Year) 2015 June 9358 Engineering Chemistry Question Paper

Code No. 9358 / N
FACULTY OF ENGINEERING
B.E. I
Year (New) (Main) Examination, June / July 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 Represent Calomel electrode and write the electrodic reaction for reduction process
and mention the S.R.P. value of the electrode.
3
2 Draw the conductometric titration plot of weak acid against strong base and explain
the graph.
3 What is waterline corrosion? Explain.
3
4 Name three substances used for sterilization of water. 2
5 Define the term "functionality" of monomers. Explain its signifiCance with a suitable
example,
2
6 Explain the types of composite materials. 3
7 Define octane number. How will you improve the anti-knocking value of fuel? 3
8 Classify rocket fuels. 2
9 Define phase and component. 2
10 Classify lubricants and give one example each.. 3
PART ? B (5x10
-
-
-
4
-
50?.Marks)
11 a) For the cell reaction Z
n
(s)+Fe
2+,
-- -Zn.
+
4;FA(s). Calculate the reactive concentration of
(s) (s)
Zn
2+
and Fe
2+
at which thaEoVerall cell E.M.F. becomes zero.
E -0.440 V an = -0.760 V. 6
b) Explain hydrogen --
.,
Ioxygen.fuel cell. 4
12 a) Define metallic corrosion. Explain electrochemical theory of corrosion. 6
b) What are the characteristics of a paint? Name the various constituents of paints. 4
1 3 a) Differentiate between homopolymer and co-polymer. 4
b) What are conducting polymers? Discuss the applications of conducting polymers. 6
14 a) What are chemical fuels? How are they classified? Give suitable examples for
each class.
b) A gaseous fuel has the following composition by volume: H2 = 25%,
methane = 30%, ethane = 11%, ethylene = 4.5%, butane = 2.5%, CO = 6.0%,
CO2 = 8%, 02 = 2% and N2 = 12%. Calculate the air fuel ratio and volumetric
analysis of dry products of combustion using 40% excess air.
6
15 a) Write the principles of Green Chemistry.
5
b) Draw a neat diagram of water system and label the parts. Calculate the degree of
freedom at triple point.
5
16 a) Derive Nernst equation.
4
b) Differentiate between potentiometric titrations and pH metric titrations by taking a
suitable example like HC! Vs NaOH.
6
17 a) How do you determine the permanent hardness of water by EDTA method?
Explain.
5
b) Explain the mechanism of extreme-pressure lubrication.
5
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