STUPIDSID
Answer any one question from Q1 & Q2
1 (a)
Explain formation of scales in boiler, give their disadvantages and methods of removal.
6 M
1 (b)
Calculate potential on redox electrode dipped in titration mixture, when 20 ml of 0.1 N Ce4+ solution from the burette is added in 100 ml 0.1 N Fe2+ solution. Standard reduction potentials for Fe3+- ? Fe2+ and Ce4+ - ? Ce3+ are 0.75 and 1.45 V respectively.
3 M
1 (c)
Explain the conductometric titration of KCI against AgNO3 solution from burette.
3 M
2 (a)
Explain the principle, instrumentation and applications of UV-Visible spectrophotometer.
6 M
2 (b)
State the problems in traditional synthesis route and advantages of green route in manufacture of adipic acid.
3 M
2 (c)
A zeolite softner gets exhausted on softening 4000 litres of hard water. Calculate hardness of the water if the exhausted zeolite requires 10 litres of 10% NaCl solution for regeneration.
3 M
Answer any one question from Q3 & Q4
3 (a) (i)
Give structural change on vulcanization of natural rubber molecules with sulphur. How does it affect the strength?
3 M
3 (a) (ii)
State the purpose of compounding polymers with plasticizers and fillers.
3 M
3 (b) (i)
Give the reaction involved in biodiesel formation and state any three advantages of biodiesel.
3 M
3 (b) (ii)
Calculate the amount of air (20% excess) required for complete combustion of 1kg wood if it contains 55% carbon, 8% hydrogen, 5% oxygen and remaining non combustible part.
3 M
4 (a) (i)
Define biodegradation of polymers. State favourable structure of polymer for biodegradation. Write structure of biopol(PHBV).
3 M
4 (a) (ii)
Give any six differences in thermosoftening and thermosetting polymers.
3 M
4 (b)
Give construction, working and calculation for finding gross calorific value of a solid fuel by Bomb calorimeter.
6 M
Answer any one question from Q5 & Q6
5 (a)
Give industrial methods of manufacturing of hydrogen gas.
5 M
5 (b)
Explain structure of diamond, give its properties and applications.
5 M
5 (c)
Give preparation, reactions of saline hydrides.
3 M
6 (a)
State the difficulties in storage of hydrogen gas. Give its chemical storage in alanates and metal hydrides.
5 M
6 (b)
Give preparation, reactions of silane.
4 M
6 (c)
Give any one method of preparing carbon nanotubes. State applications of carbon nanotubes.
4 M
Answer any one question from Q7 & Q8
7 (a)
Give the mechanism of electrochemical corrosion.
5 M
7 (b)
Explain 'nature of metal' factors affecting rate of corrosion.
5 M
7 (c)
What are types of metallic coatings? Which is prefered? Why?
3 M
8 (a)
Give principle, construction and applications of cathodic protection.
5 M
8 (b)
Explain 'powder coating' method for corrosion control.
4 M
8 (c)
Account on, 'nature of oxide films on metal surface and its effect on further corrosion.
4 M
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