Engineering Chemistry -Engineering-VTU-January- 2020(CBCS)
Visvesvaraya Technological University
B.E. First Semester All Branches (C.B.C.S.)
Engineering Chemistry
TIME: 3HOURS MAXIMUM MARKS-100
Note-Answer FIVE full questions, choosing one full question from each module.
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Q1.a)Define free energy. Derive Nernst Equation for single electronic potential. [7M]
b)What are reference electrodes? Describe the construction and working of the calomel electrode. [6M]
c)Explain the construction and working of Ni-Metal Hybride battery. Give the reaction during charging and discharging mode. Give any two applications. [7M]
OR
Q2.a)Describe the construction and working of Ni-Metal Hybride battery. Give its applications. [7M]
b)Write note on primary, secondary and reserve batteries. [6M]
c)What are concentration cells? EMF of the cell Ag/AgNO3(C1) //AgNO3(C2=0.2M)/Ag is 0.8V.Calculate C1 of the cell. [7M]
Q3.a)What is corrosion ? Explain the electrochemical theory of corrosion by taking iron as an example. [7M]
b)Explain i)Differential metal corrosion ii)Pitting corrosion. [7M]
c)What do you mean by metal finishing?Mention any five technological importances. [6M]
OR
Q4.a)Define and explain any two terms : [6M]
i)Polarisation
ii)Decomposition potential
iii)Overvoltage.
Q5.a)What is knocking? Explain the mechanism. [7M]
b)On burning 0.96 grams of solid fuel in bomb calorimeter the temperature of 3500 grams of water increased by 2.70C water equivalent of the calorimeter and latent heat of steam are 385 grams and 587 cal/grams respectively. If the fuel contains 5% H2 , calculate its gross and net calorific value. Specific heat of water =4.187kJ/kg K. [6M]
c)What are fuel cells? Describe the construction and working of CH3OH-O2 fuel cell. [7M]
OR
Q6.a)What are solar cells? Explain the construction and working of typical P.V. cell. [ 7M]
b)Explain the production of solar-grade Si by union carbide process. [7M]
c)Write a note on :
i)Power alcohol
ii)Unleaded petrol
Q7.a)What are the main sources, effects and control of lead pollution? [7M]
b)Mention the various causes ,effects and disposal methods of e-waste. [7M]
c)50ml of an industrial sewage has consumed 11.5ml of 0.4 N K2Cr2O7 solution for complete oxidation. Calculate COD of industrial sewage.[6M]
OR
Q8.a)Explain the activated sludge treatment of sewage water. [7M]
b)What is desalination? Describe the desalination of seawater by reverse osmosis. [7M]
c)Write a note on ozone depletion. [6M]
Q9.a)Explain the theory, instrumentation and application of calorimetry. [6M]
b)What is potentiometer titration? Explain the principle involved in potentiometer titration. [7M]
c)Write a note on Fullerene.Mention its application.
OR
10.a)What are nano-materials? Give their synthesis by sol-gel techniques. [7M]
b)Write a note on Graphenes. Mention their applications. [7M]
c)Explain the theory and applications of atomic absorption spectroscopy. [6M]