Engineering Chemistry-Engineering-Aurangabad University-SUMMER2015

AURANGABAD UNIVERSITY
FACULTY OF ENGINEERING
F.E -Year Examination June – 2015
Engineering Chemistry & Environmental Science
(Revised)

CODE NO:- Z-217
[Time: Two Hours]
[Max. Marks: 40]
“Please check whether you have got the right question paper.”
i) Question No.1 is compulsory
ii) Solve any two questions from remaining questions
iii) Figures to the right indicate full marks
iv) Use of non – programmable calculator is allowed
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Q.1 Answer the following questions (any five) [10]

a) How hard water is different soft water?

b) What are possible combinations of alkalinity

c) Define PH. Give its range for acidic and basic solution

d) Define LCV and HCV

e) Write formula for calculation of calorific value of coal using bomb calorimeter using corrections

f) How fixed carbon percentage in coal is calculated

g) Define condensation polymerization. Give two example of such polymers

h) Write formula for BUNA-S and butyl rubber

i) Draw diagram of coiled structure of rubber

Q.2 a) 100 ml hard water is titrated for total and permanent hardness in which 0.1m EDTA gives 4.6 and 2.1 ml
burette reading respectively. Calculate all types of hardness. (1 ml of 0.1 m EDTA = 10.0 mg.CaCO3)  [06]

b) How water is purified by electrodialysis [05]

c) Define scale formation in boiler how it is prevented [04]

Q.3 a) Define calorific value of coal. How it is depend on presency of N,S,O,C and H in coal. [06]

b) How mining of petroleum oil is done? [05]

c) Explain octane No. and cetane No. far liquid fuels [04]

Q.4 a) Define polymerization. Give mechanism of addition polymerization [06]

b) Give preparation, properties and uses of Teflon [05]

c) How natural runner is obtained [04]

Q.5 a) Explain zeolite process of water softening [05]

b) Give applications of potentiometer [04]

c) Coal containing 2.5 percentages of by dragon have 7000 GCV. Calculate iD NCV [03]

d) What is source of natural gas? Give its composition [03]