STUPIDSID
Answer any five of the following:-
1 (a)
What is season cracking?
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1 (b)
Give composition, properties and uses of soft solder.
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1 (c)
A sample of coal contains C = 70%, O = 23%, H = 5%, S = 1.5%, N = 0.4%, Ash = 0.1%. Calculate G.C.V and N.C.V of fuel.
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1 (d)
What are fibre composites?
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1 (e)
What is green fuel?
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1 (f)
Give significance of proximate analysis.
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2 (a)
Explain the direct chemical corrosion.
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2 (b)
1.5 gm of sample of coal was taken in a crucible for C and H estimation, by combustion method. The increase in weight of tube containing CaCl2 and bulb containing KOH, was found to be 1.25 gm and 4.88 gm respectively. Calculate %C and %H.
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2 (c)
Giving conventional and greener route for production of adipic acid, explain related green chemistry principle in this case.
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3 (a)
Explain method of obtaining biodiesel from vegetable oil? Give advantages of Biodiesel.
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3 (b)
100 ml of natural solution containing 0.2 gm of Cu2+ion electrolysed till entire copper was deposited. The currrent strength was 1.2 amperes and volume of solution maintained at 100ml. Assume 100% efficiency. Calculate time taken for deposition of copper. (Atomic wt.of copper = 63.58).
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3 (c)
Explain the principle of use of safer solvent and reaction condition in green chemistry with suitable examples.
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4 (a)
Calculate weight of air needed for complete combustion of 1 Kg of coal containing C = 72%, H = 10%, O = 9%, N = 3% and remaining being ash.
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4 (b)
Describe absorption and catalytic properties of zeolite.
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4 (c)
What is powder metallurgy? How are metal powders prepared.
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5 (a)
Give the functions of matrix phase in composite materials and their properties.
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5 (b)
What is cracking? Give advantages of catalytic cracking over thermal cracking.
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5 (c)
The composition of gas was found to be H2 = 10%, CH4 = 20%, C2H6 = 16%, N = 6%, CO = 18%, CO2 = 22%, O2 = rest. Calculate volume of air required for complete combustion of 1m3 of fuel. (Mol. Wt. of air = 28.949)
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6 (a)
Discuss the corrosion due to combination of metals due to metals of different electrode potentials.
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6 (b)
What are ceramic powder? Explain method of manufacturing any one ceramic powder.
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6 (c)
Define cetane and octane number
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7 (a)
How does a catalyst affect the establishment of equilibrium state and activation energy of reaction? Explain with necessary graph.
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7 (b)
Write characteristics of good fuels.
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7 (c)
Which are main constituents of varnishes? Write their functions.
OR
Calculate the percent atom economy w.r.t allylchloride
CH3 — CH = CH2 + Cl2 → Cl — CH2 — CH = CH2 + HCl
OR
Calculate the percent atom economy w.r.t allylchloride
CH3 — CH = CH2 + Cl2 → Cl — CH2 — CH = CH2 + HCl
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