STUPIDSID
Answer any five from the following:
1 (a)
What are propellants? State importants characteristics of good propellant.
4 M
1 (b)
Compare Galvanizing and Tinning.
4 M
1 (c)
Give composition, properties and used of Wood's Metal.
4 M
1 (d)
Write a note on 'Green Reagent'.
4 M
1 (e)
Define terms:-
(i) Composite material (ii) Matrix phase (iii) Dispersed phase.
(i) Composite material (ii) Matrix phase (iii) Dispersed phase.
4 M
1 (f)
List three main constituents of Varnish & give functions of each.
4 M
1 (g)
A coal sample was subjected to ultimate analysis:
1.6 gm of coal on combustin in Bomb calorimeter gave 0.47 gm of BaSO4 Calculate % of sulphur in the coal sample.
1.6 gm of coal on combustin in Bomb calorimeter gave 0.47 gm of BaSO4 Calculate % of sulphur in the coal sample.
4 M
2 (a)
What is dry corrosion? Explain with example how nature of oxidised product affect the rate of corrosion.
6 M
2 (b)
What is cracking? Explain fixed bed catalytic cracking with diagram.
5 M
2 (c)
Calculate percentage atom economy for the following reaction w.r. to methy iso-cyanate
CH3NH2+COCI2 ? CH3-N=C=O+2HCI
CH3NH2+COCI2 ? CH3-N=C=O+2HCI
4 M
3 (a)
A gaseous fuel has the following composition by volume.
CH4=35%, C2H4=5%, CO=15%, H3=40% N2=1 water vapour=4% Calculate volume & Weight of air required for complete combustion of 1m3 of fuel [mol.wt of air=28.94]
CH4=35%, C2H4=5%, CO=15%, H3=40% N2=1 water vapour=4% Calculate volume & Weight of air required for complete combustion of 1m3 of fuel [mol.wt of air=28.94]
6 M
3 (b)
Explain conventional & green synthesis of adipic acid. Mention the green chemistry principle involved.
5 M
3 (c)
How the rate of corrosion influenced by following factors.
i) PH of medium (ii) Over voltage
i) PH of medium (ii) Over voltage
4 M
4 (a)
What is poweder Metallurgy? How are metal powders prepared using
i) Atomization
ii) Chemical reduction
i) Atomization
ii) Chemical reduction
6 M
4 (b)
What is cathodic protection? Explain Impressed current method of corrosion control.
5 M
4 (c)
Write a note on 'Sandwich panel' type layered composites.
4 M
5 (a)
What is Bio-diesel? Explain the trans esterification method for its synthesis. Mention advantages of biodiesel as fuel.
6 M
5 (b)
What are alloys? Explain any four purpose of making alloys with suitable example.
5 M
5 (c)
Discuss the physical factors influencing adhesive action.
4 M
6 (a)
Write a note on differential areation corrosion.
5 M
6 (b)
2.5 gm of air dried coal sample was taken in a crucible, after heating it in an electric oven at 110°C for 1 hr the residue was weighed 2.41 gm. The residue was heated in Silica crucible covered with vented lid at a temperature 925±257°C for exactly 7 minutes. After cooling the weight of residue was found to contain 1.98 gm. The residue was then ignited to a constant weight of 0.246 gm. Report the results of above analysis.
5 M
6 (c)
Explain the effects of following elements on alloying:
i) Nickel
ii) Chromium
iii) Cobalt
iv) Molybdenum
v) Carbon.
i) Nickel
ii) Chromium
iii) Cobalt
iv) Molybdenum
v) Carbon.
5 M
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