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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.
kenematics of rigid body in rotation
how to calucuate weight% of hydrogen sulphate when density =20 and temparature =80 are given
the chemical reaction taking place in the kiln?
au
#quehe two sides of a triangle are 17 cm and 28 cm long, and the length of the median drawn to the third side is equal to 19.5 cm. Find the distance from an endpoint of this median
a wet gas is produced through a two -stage seperator system. the 555 psia -89degree fahrenheit separator produces 170,516 scf/stb, and the 70 degree farenheith stock tank produces
leaching
1. Wastewater leaving the ACME cheese factory must be neutralized to a pH between 6.8 and 7.2. Citric acid is available to decrease pH and sodium hydroxide is used to increase pH.
two altitudes of an isosceles triangle are equal to 20 cm and 30 cm determine the possible measures of the base angles
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