Jawaharlal Nehru Technological University Kakinada 2012-1st Year B.Tech 1st st semester Engineering Chemistry R10 Set no:1 - Question Paper

Set Code No: R10104 / R10
No. 1
I B.Tech I Semester Regular exams January 2012
ENGINEERING CHEMISTRY - I (Common to all branches)
Time: three hours Max Marks: 75
ans any 5 ques. All ques. carry equal marks
1.(a) Why there is a reduce in temperature of a real gas when it undergoes expansion
through a porous plug?
(b) What is osmosis and what is osmotic pressure?
(c) discuss the concept of solubility product with a suitable example.
[5M + 5M + 5M]
2.(a)Explain briefly the Tyndall effect?
(b)Give (any four) charecteristics of enzymes?
(c)What are the factors that influence the viscosity of a liquid?
3.(a)Using Jabloski diagram, discuss flouroscence.
(b)What is ion selective electrode? provide at lowest 2 examples.
(c)Explain any 2 important applications of NMR spectroscopy
4.(a)Differentiate ranging from insulators, conductors and semi-conductors in terms of valance and conduction band.
(b)Discuss 2 important applications of super conductors.
(c)Explain 2 important applications of liquid crystals.
5.(a) Briefly discuss the important characteristics of a good fuel.
(b) discuss briefly how the By-product Oven method of producing coke differs from
Beehive oven process.
(c) compute the gross and net calorific values of coal having the subsequent composition:
Carbon: 87% Hydrogen: 5% Sulphur : 0.5% Nitrogen : 0.5% Oxygen : 3% Ash :4% latent heat of steam : 587 cal / gram.
[4M + 5M + 6M]
6.(a) Derive the Nernst formula for the potential of a reduction electrode.
(b) define the construction of calomel electrode.
(c) How is a fuel cell better than a battery?
[5M + 5M + 5M]
7.(a) discuss the terms: (i) Mass defect and (ii) Binding energy
(b) discuss briefly how a fission reaction leads to release of large amount of energy. (c) What functions are served by the moderator and coolant in a nuclear reactor?
[5M + 5M + 5M]
8.(a) How do the photovoltaic cells work?
(b) define how the solar power plants are used to harness solar energy. (c) discuss the reasons for the green house effect felt by earth.
[5M + 5M + 5M]

Earning:   Approval pending.