STUPIDSID
Solve any five :-
1 (a)
Give the principle of estimation of hardness of water using EDTA method (only equations)
3 M
1 (b)
Natural rubber needs to be vulacanised. Give reasons for the same.
3 M
1 (c)
What are the function of lubricant ?
3 M
1 (d)
Give the preperation, properties and uses of dolomite bricks.
3 M
1 (e)
What is a condensed system? State the condensed phase rule equation.
3 M
1 (f)
Classify the following salts into temporary and permanent hardness causing salts and also calculate their calcium carborate equivalents.
(i) Ca (HCO3)2 - 16.2 mg/L
(ii) MgSO4 - 1.2 mg/L
(iii) FeCI2 - 12.7 mg/L
(iv) NaCI - 94 mg/L
(i) Ca (HCO3)2 - 16.2 mg/L
(ii) MgSO4 - 1.2 mg/L
(iii) FeCI2 - 12.7 mg/L
(iv) NaCI - 94 mg/L
3 M
1 (g)
Name the various ingredigents used in the compounding of plastics and give two examples of each.
3 M
2 (a)
Calculate the quantity of pure lime and soda required for softening 50,000 litres of water containing the following salts per litre-
Ca (HCO3)2 - 8.1 mg;Mg (HCO3)2 - 7.3 mg;
CaSO4 - 13.6 mg; MgSO4 - 12.0 mg;
NaCI -4.7 mg; MgCI2 - 23.75 mg.
Ca (HCO3)2 - 8.1 mg;Mg (HCO3)2 - 7.3 mg;
CaSO4 - 13.6 mg; MgSO4 - 12.0 mg;
NaCI -4.7 mg; MgCI2 - 23.75 mg.
6 M
2 (b)
Define (i) Phase (ii) Component (iii) Degree of freedom. State the number of phase, components and the number of degree of freedom for the following equilibrium.
H2O(s) ? H2O(1) ? H2O (vapour)
H2O(s) ? H2O(1) ? H2O (vapour)
5 M
2 (c)
What are carbon nanotubes? Discuss the CVD method of preperation of CNT.
4 M
3 (a)
Discuss the mechanism of boundry film lubrication.
6 M
3 (b)
What are thermoplastics polymers? Name any two thermoplastics polmer.Give the preperation, properties and uses of any one thermoplastics polymer.
5 M
3 (c)
Draw the phase diagram of one component water system. Explain triple point.
4 M
Write short notes on any two :-
4 (a) (i)
Glass transition temperature
3 M
4 (a) (ii)
Conducting polymers.
3 M
4 (a) (iii)
Polymers used in medicine and surgery.
3 M
4 (b)
With a neat diagrams explain the principle of Ion-Exchange method of softening of water and also give the softening and regeneration reactions.
5 M
4 (c)
3g of vagetable oil was mixed with 50 ml of 0.5N KOH solution and heated for 1 hour. The mixture required 19ml of 0.5 HCI. The blank titration reading was 49ml. Find the saponification value of the oil sample.
4 M
5 (a)
Name the raw materials necessary for the manufacture of portland cement. Draw a neat labelled diagram of the rotary kill and write the chemcal reaction alongwith the temperature. Also mention the function of Alumina and gypsum in cement.
6 M
5 (b)
What is moulding ? Explain with the help of a neat diagrams Extrusion moulding of an insulated cable.
5 M
5 (c)
The hardness of 50,000 litres of a sample of water was removed by passing it through a zeolite softener. The sofener required 200 litres of NaCI solution containing 125 g/L of NaCI for regeneration. Calculate the hardness of the sample of water.
4 M
6 (a) (i)
Define and explain the significance of BOD and COD.
3 M
6 (a) (ii)
Discuss reverse osmosis.
3 M
6 (b)
Give the preperation and uses of
(i) Kevlar
(ii) Polyurethane
(i) Kevlar
(ii) Polyurethane
5 M
Write note on any two :-
6 (c) (i)
Acid value of oil
2 M
6 (c) (ii)
Flash and fire point
2 M
6 (c) (iii)
Semi solid lubricant
2 M
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