STUPIDSID
Solve any one question from Q1 and Q2
1 (a)
Discuss the Ion-Exchange method for softening of hard water with the help of reactions involved in removal of ions and regeneration of the exchangers. Draw a neat labelled diagram and give limitations of the process.
6 M
1 (b)
Define the following terms:
i) Bathochromic shift
ii) Hypochromic shift
ii) Chromophore.
i) Bathochromic shift
ii) Hypochromic shift
ii) Chromophore.
3 M
1 (c)
Explain the conductometric titration curve for the reaction between KCI and AgNO3.
3 M
2 (a)
Explain the potentiometric titration of Fe2+ against Ce4+ giving reactions. Draw the titration curve and give the formulae for calculating emf of the cell at various stages of the titration.
6 M
2 (b)
Give the demerits of the traditional route and merits of the green route of synthesis of polycarbonate.
3 M
2 (c)
50 ml of water sample required 12.1 ml of N/50 HCI to reach the phenolphthalein end-point and 18.5 ml of the same acid for the methyl orange end-point. Calculate types and amount of alkalinities present.
3 M
Solve any one question from Q3 and Q4
3 (a)
Define glass transition temperature. Give its significance and discuss any four factors affecting it.
6 M
3 (b)
Define GVC and NCV. Give the justification of how they are related.
3 M
3 (c)
A coal sample has the following composition:
C=70%, H=10%, N=3%, S=3%, O=2% and ash=12%. If 20% excess air is required for complete combustion, then calculate the amount of air required for complete combustion of 1 kg of coal.
C=70%, H=10%, N=3%, S=3%, O=2% and ash=12%. If 20% excess air is required for complete combustion, then calculate the amount of air required for complete combustion of 1 kg of coal.
3 M
4 (a)
Explain in brief the process of fractional distillation of petroleum with diagram. Give the composition and boiling range of petrol and diesel obtained.
6 M
4 (b)
Give the purpose and examples of the following constituents used during the compounding of plastics:
i) Fillers
ii) Lubricants
iii) Plasticisers.
i) Fillers
ii) Lubricants
iii) Plasticisers.
3 M
4 (c)
Explain solution polymerisation techniques. Draw the figure and state the disadvantages of this technique.
3 M
Solve any one question from Q5 and Q6
5 (a)
Explain the structure of fullerene. Give any two properties and two applications of fullerene.
5 M
5 (b)
Give the preparation reaction and applications of germane and lithium hydride.
4 M
5 (c)
Discuss the properties of hydrogen which make it difficult for storage.
4 M
6 (a)
Explain the production of hydrogen by water splitting using solar energy.
5 M
6 (b)
Discuss the different types of carbon nano tubes with respect to their structure. Give any two applications of it.
4 M
6 (c)
Explain the structure of graphite. Give its properties and applications.
4 M
Solve any one question from Q7 and Q8
7 (a)
Give the Pilling-Bedworth ratio and its significance. Give the oxidation reaction involved and state the type of film formed on the surface in the case of Mg. Cr and Mo.
5 M
7 (b)
Explain the process of galvanising With labelled diagram. Give the applications and limitations of this technique.
4 M
7 (c)
State the different types of corrosion inhibitors With
their examples. Discuss in brief their role in corrosion
Prevention.
4 M
8 (a)
Discuss any five factors affecting corrosion.
5 M
8 (b)
Define corrosion. Explain the hydrogen evolution mechanism of wet corrosion.
4 M
8 (c)
What is the principle of cathodic protection? Discuss
any one technique of cathodic protection and give its
Applications.
4 M
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