Engineering Chemistry -Engineering-VTU-January- 2017
Visvesvaraya Technological University
B.E. First Semester All Branches
Engineering Chemistry
TIME: 3HOURS MAXIMUM MARKS-80
Note-Answer FIVE full questions, choosing one full question from each module.
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Q1.a) Describe the construction and working of the Li-MnO2 battery. [5M]
b)Define battery. Explain the following battery characteristics: [5M]
i)Electricity Storage density
ii)Energy Efficiency
iii) Cycle life
iv)Shelf life
c)Define reference electrode. Explain the construction and working of the Calomel electrode. [6M]
OR
Q2.a)A concentration cell was constructed by immersing two silver electrodes in a 0.02M and 2 M AgNO3 solution. Write the cell representation, cell reactions and calculate the EMF of the cell at 250C. [5M]
b)Derive Nernst equation for single electrode potential. [5M]
c)Explain the construction and working of Methanol-Oxygen fuel cell. Mention its application. [6M]
Q3.a)What is cathodic protection? Explain how a metal article is protected by a sacrificial anodic method. [5M]
b)Explain the following factors affecting the rate of corrosion : [5M]
i) Nature of the metal
ii) Ratio of anodic to cathodic areas
iii)pH
c)Explain electroless plating of copper with relevant reaction. [6M]
Q4.a)What is metal finishing? Give the technological importance of metal finishing. [5M]
b)Explain the influence of the following factors on the nature of electrodeposit: [5M]
i)pH
ii)Temperature
iii)Concentration of the metal ion.
c)Explain stress and differential metal corrosion with example. [6M]
Q5.a)Define cracking. Describe fluidized-bed catalytic cracking. [5M]
b)What is biodiesel? Explain the synthesis and advantages of biodiesel. [5M]
c)Explain the production of solar-grade silicon by the union-carbide process. [6M]
OR
Q6.a)Define photovoltaic cell. Explain the construction and working of a photovoltaic cell. [6M]
b)Explain the purification of silicon by zone refining. [4M]
c)A 0.6 g of coal sample (carbon 90%, H2 3%, and ash 7%) was subjected to combustion in a bomb calorimeter. The mass of water taken in the calorimeter was 200g and the water equivalent of the calorimeter was 400g. The rise in temperature was 30C. Calculate the gross and net calorific value of the sample. Given, the specific heat of water is 4.187kJ/kg0C and the latent heat of steam is 2454 kJ/kg. [6M]
Q7.a)Explain the free radical mechanism for addition polymerization by taking vinyl chloride as an example. [6M]
b)Explain the synthesis, properties, and applications of epoxy resin. [4M]
c)What is glass transition temperature? Explain the following factors affecting glass transition temperature. [6M]
i)Chain flexibility
ii)Intermolecular forces
OR
Q8.a)Explain the structure-property relationship of polymers with respect to :[5M]
i)Crystallinity,
ii)Tensile strength
b)What is polymerization? Explain addition and condensation polymerization with example. [5M]
c)What are polymer composite ? Explain the synthesis, properties, and application of Kevlar fiber. [6M]
Q9.a)Write a note on fullerenes. Mention its application. [5M]
b)Discuss the synthesis of nanomaterials by gas condensation method and chemical vapour condensation processes. [5M]
c)Discuss the experimental determination of Dissolved Oxygen (DO) of waste water. Mention the reaction involved in it. [6M]
OR
Q10.a) What is desalination? Discuss the desalination of sea water by the ion exchange process. [5M]
b)What is boiler feed-water? Explain the scale and sludge formation in boilers. [5M]
c)Explain any three-size-dependent properties of nanomaterials. [6M]