_______________ is a copolymer ?
_______________ is a copolymer ?
A. Nylon-66
B. Polypropylene
C. PVC
D. Poly tetra fluoro ethylene
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Branched chair polymers as compared to linear polymers have _________________?
Branched chair polymers as compared to linear polymers have _________________?A. Higher melting point
B. Higher tensile strength
C. Lower density
D. None of theseNitrile rubber is produced by the polymerisation of_________________?
Nitrile rubber is produced by the polymerisation of_________________?A. Acrylonitrile & butadiene
B. Acrylonitrile & styrene
C. Isobutylene & isoprene
D. None of theseVulcanisation of rubber does not increase its_________________?
Vulcanisation of rubber does not increase its_________________?A. Elasticity
B. Plasticity
C. Ductility
D. None of thesePlastic tubes & pipes are generally made by ______________ moulding?
Plastic tubes & pipes are generally made by ______________ moulding?A. Injection
B. Transfer
C. Extrusion
D. CompressionContact lenses for eyes are made of Perspex, which is nothing but_______________?
Contact lenses for eyes are made of Perspex, which is nothing but_______________?A. poly-methyl-methacrylate
B. Polystyrene
C. Unsaturated polyester
D. PolypropyleneThe monomer for the production of neoprene rubber is_________________?
The monomer for the production of neoprene rubber is_________________?A. Acetylene
B. Chloroprene
C. Isoprene
D. None of these