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1. a) How are Polymers classified?
b) Define polymerization. Differentiate addition and condensation polymerization.
2. a) Explain the free radical mechanism of addition polymerization taking ethylene as a monomer.
b) Give the synthesis and applications of Teflon.
3. a)Differentiate between thermoplastics and thermosetting plastics.
b)What is glass transition temperature?Discuss the following factors affecting GTT
i) Flexibility ii) Intermolecular forces.
4. a) Explain the manufacture and applications of the following high polymers:
i)Polymethylmethacrylates (plexi glass) ii) polyurethanes.
b) What are elastomers? Mention the advantages of synthetic rubber over natural rubber.
5. a) What are the deficiencies of natural rubber? What is vulcanization of rubber.
b) Explain the manufacture of Silicone rubber. Mention their applications.
Bulk density: This is represented by the weight per unit volume of the refractory of (g/cm 3 ). This volume includes the volume of the pores space, therefore, higher the bulk dens
construction and working of calomel and Ag-AgCl electodes
air flows through apipe at arte of 200L/S. The pipe of two sections of diameters 20cm and 10cm with asmoth reducing section the pressure are difference between the two pipe sectio
Porosity: The property of the refractory brick is the ratio of its pore volume to the total volume. The refractory material with high porosity is not preferred for furnace lining
PROCESSING OF BILL FOR PAYMENT : Your Counsellor will give you one bill. In that bill, you make relevant entries of the following statement using your imagination.
Positive and Negative Photo resist There are two types of photo resist: positive and negative. For positive resists, the resist is exposed with UV light where the underlying ma
Thermal spelling: The breaking or cracking or peeling off the refractory is known as spelling. A good refractory must show a good resistance to thermal spelling. Thermal spelling
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It is desired to concentrate a NaOH solution from 12.5 % to 40% in a double effect evaporator. 50,000 lb/hr of feed solution enters the evaporator at 120 o F, and steam at 15 psig
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