Rajasthan Technical University 2010-2nd Sem B.Tech (R.T.U) ister (Main) , e-, Engineering Chemistry-2, Common to all branches of Engineering - Question Paper

Time: three Hours Maximum Marks : 80
Min. Passing Marks : 24
Unit-1
1. a) Draw neat and labelled diagram and discuss coke manufactured by Otto-Hoffmann's methods. (8)
b) elaborate the Knocking and Octane number? How these are related to the chemical structure of
the fuel. [marks 8]
OR
a) With the help of neat labelled diagram, define how gasoline can be synthesized from water
gas. [marks 8]
b) (1) discuss the advantages and disadvantage of gaseous fuel. [marks 4]
(2) Write the comparative study of solid, liquid and gaseous fuels. [marks 4]

Unit-2

2. a) provide the experimental details for calculating higher and lower calorific values of solid fuel
by Bomb-calorimeter. [marks 8]
b) A sample of petrol as obtained to contain 15.4% of hydrogen and 84.6% of carbon by weight.
compute the quantity of oxygen at NTP needed for the complete combustion of one kg of this
fuel. [marks 8]
OR

a) Write shorts notes on :
(1) Fuel gas analysis by Orsat's apparatus. [marks 4]
(2) Ultimate analysis of coal. [marks 4]
b) A gaseous fuel have the subsequent composition by quantity.
H2=20%, CH4=50%, CO=20%, CO2=5%, N2=50%. If 50% excess of air is used, obtain the weight of air
truly supplied per m^3 of this gas. [marks 8]

Unit-3

3. describe the terms phase, component and degree of freedom. discuss the sulphur system with phase
diagram. [marks 16]

OR

What is decreased phase rule? discuss the terms involved in it. discuss Bi-Cd system with phase
diagram. [marks 16]

Unit-4

4. a) discuss Meissner effect in superconductors. Write the application of superconductor. [marks 8]
b) Write short notes on Fullerenes. [marks 8]
OR
a) elaborate optical fibre? define the construction, working, and application of optical fibre.
[marks 8]
b) What is organic electronic materials? How do they differ from inorganic semiconductor? [marks 8]

Unit-5

5. describe corrosion of metals. elaborate various kind of corrosion? discuss the electrochemical
theory of wet corrosion, giving its mechanism. [marks 16]

OR

Write short notes on any 3 of the subsequent : [marks 6+5+5]
a) Protective-Inorganic and Organic Coating.
b) Pitting corrosion.
c) Galvanic cell.
d) Passivation.

Earning:   Approval pending.