STUPIDSID
1(a)
Define reference electrode. Explain the measurement of single electrode potential using calomel electrode . Derive Nernst's equation for single electrode potential .
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1(b)
What are the types of electrodes? Explain briefly with an example for each .
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1(c)
What are batteries? Explain the following battery characteristics; (i) Cell potential
(ii) Cycle life.
(ii) Cycle life.
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1(d)
Describe the construction , working and application of Nickel-metal hyride battery .
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2(a)
What are ion-selective electrodes? Expalin the determination of pH of a solution using glass electrode.
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2(b)
What are concentration cells? Calculate the cell potential of the following cell at 298 K Ag/AgC1(0.01m)||AgC1(0.5m)/Ag
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2(c)
Describe the construction and working of methanol-oxygen fuel cell.
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2(d)
Explain the construction, working and application of Li-MnO2 battery.
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3(a)
Define the term corrosion. Explain pitting corrosion and water line corrosion.
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3(b)
Explain the following factors affecting rate corrosion;
(i) Nature of metal
(ii) pH
(iii) Corrosion product.
(i) Nature of metal
(ii) pH
(iii) Corrosion product.
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3(c)
Explain decompostition potential and polarization with respect to electroplating.
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3(d)
Explain the process of electroplating of hard chromium. Give the reason for not using chromium as anode.
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4((c)
Explain how the following factor influence the rate of electro deposit;
(i) Current density
(ii) Throwing power .
(i) Current density
(ii) Throwing power .
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4(a)
What is galvanization ? Explain the process of galvanization.
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4(b)
What is cathodic protection ? Explain sacrificial anode and impressed current method .
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4(d)
What is electroless plating ? Explain the process of electroless plating of copper on PCB.
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5(a)
Exlplain the determination of calorific value of soild/liquid fuel using Bomb Calorimeter.
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5(b)
What is knocking ? Explain gasoline knocking mechanism with chemical reactions.
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5(c)
What is biodiesel? Give its synthesis .
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5(d)
Explain the construction and working of a PV-Cell
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6(a)
Define petroleum cracking. Explain fluidized catalytic cracking .
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6(b)
Define the following:
(i) Octane number
(ii) Power alcohol
(iii) Antiknocking agents
iv) Centane number
(v) Bio-gas.
(i) Octane number
(ii) Power alcohol
(iii) Antiknocking agents
iv) Centane number
(v) Bio-gas.
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6(c)
Explain zone refining technique for purification of sillicon and difusion method.
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6(d)
Calculate the gross and net calorific value of a sample of coal from the following data;
Mass of coke = o.98g
Mass of water =2600g,
Water equivalent of calorimeter = 368g,
Specific heat of water = 4.187 J/g/K
Rise in tempreature = 2.8K
percentage of Hydrogen in the fuel sample = 5.8 Latent heat of steam = 2454 J/g
Mass of coke = o.98g
Mass of water =2600g,
Water equivalent of calorimeter = 368g,
Specific heat of water = 4.187 J/g/K
Rise in tempreature = 2.8K
percentage of Hydrogen in the fuel sample = 5.8 Latent heat of steam = 2454 J/g
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7(a)
Explain addition and condensation polymerization with suitable example to each .
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7(b)
In a sample of polymer 20 percentage of molecules have molecular mas 15000 g/mol, 35 percentage molecules have molecular mass 25000 g/mol, 45 percentage molecules have molecular mass 20000 g/mol, calculate the number average and weight average molecular mass off a polymer .
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7(c)
Give the synthesis, properties and application of poly urethane.
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7(d)
What are polymer composites? Explain the synthesis and properties of carbon fiber .
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8(a)
Explain the free radial mechanism of addition polymerization of Vinyl chloride.
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8(b)
What are adhesives ? Explain the synthesis and properties of epoxy resin.
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8(c)
What is glass transition tempreature ? Explain any three factor affecting Tg.
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8(d)
What are conducting polymers? Explain the mechanism of conduction in polyaniline .
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9(a)
What is Boiler feed water? Explain the corrosion of water boilers due to dissilved oxygen, CO2 and mg Cl2.
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9(b)
Explain the Winkler's method of determining dissolved oxygen. Give the reactions invovled .
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9(c)
Discuss the gas condensation and hydrothermal process for the synthesis of nano materials.
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9(d)
Give the synthesis, properties and application of carbon-nano tubes.
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10(a)
Explain the reason for scale and sludge formation in water boilers. Mention its effects.
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10(b)
Define COD. If 20cm3 of waste water sample comsume 30cm3 of 0.01 N K2Cr2O7 for oxidation of impurities, calculate COD value of water sample.
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10(c)
Explain Sol-gel method for preparation of nanomaterial with an example.
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10(d)
Give the structural feature, properties and applications of fullerene.
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