Which of the following is not a polyolefin ?
Which of the following is not a polyolefin ?
A. Polystyrene
B. Polypropylene
C. Neoprene
D. None of these
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The main use of butadiene is____________________?
The main use of butadiene is____________________?A. As a plasticiser for unsaturated polyester
B. In the manufacture of synthetic rubber
C. As an anti-skimming agent in paint
D. None of theseThermocol (expanded polystyrene) is not used for __________________?
Thermocol (expanded polystyrene) is not used for __________________?A. Low temperature thermal insulation as in refrigerator and air conditioners
B. Acoustic control and ceiling for building
C. High temperature thermal insulation in furnaces
D. Packing of delicate electronic gadgetsVulcanisation of rubber does not increase its_________________?
Vulcanisation of rubber does not increase its_________________?A. Elasticity
B. Plasticity
C. Ductility
D. None of theseVulcanisation of rubber decreases its__________________?
Vulcanisation of rubber decreases its__________________?A. Tensile strength
B. Resistance to organic solvents
C. Tackiness
D. Working temperature rangeOrlan fibre which is used as a wool substitute is __________________?
Orlan fibre which is used as a wool substitute is __________________?A. An amorphous polymer
B. A natural polymeric fibre
C. Polyacrylonitrile
D. Poly-methyl-methacrylate (PMMA)_____________ is not a polyester fiber?
_____________ is not a polyester fiber?A. Terylene
B. Dacron
C. Nylon
D. Polyacrylonitrile