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MCQs 1: The repeating units of PTFE are___________________?

Cl2CH-CH3 F2 C = CF2 F3 C-CF3 FClC = CF2
Answer Explanation

MCQs 2: Rayon is superior to cotton in making gauge for wound treatment, because rayon_____________________?

Is a synthetic polymer Does not stick to the wound unlike cotton Can absorb over 90% of its own weight of water Both B. and C.
Answer Explanation

MCQs 3: Polystyrene is a light, transparent, thermoplastic material used for making __________________?

Toys and combs Packaging bags Non-sticking utensils Electrical insulation
Answer Explanation

MCQs 4: Polypropylene is preferred to polythene, because the former is ____________________?

Non-inflammable Harder Stronger Both B. & C.
Answer Explanation

MCQs 5: The inter particle forces between linear chains in nylon-66 are ______________ bonds?

Hydrogen Covalent Ionic None of these
Answer Explanation

MCQs 6: Hot drink (e.g., tea) cups are usually made of _____________________?

Polystyrene Polythene Polypropylene PVC
Answer Explanation

MCQs 7: Low density polythene as compared to high density polythene is____________________?

Harder Tougher Chemically inert More flexible
Answer Explanation

MCQs 8: _______________ is a copolymer ?

Nylon-66 Polypropylene PVC Poly tetra fluoro ethylene
Answer Explanation

MCQs 9: Lavatory cisterns are normally made of ________________?

Expanded polystyrene Saturated polyester Perspex PVC
Answer Explanation

MCQs 10: Epoxy resin is____________________?

Not used for surface coating A good abrasive An elastomer A polyester
Answer Explanation

MCQs 11: Nitrile rubber is produced by the polymerisation of_________________?

Acrylonitrile & butadiene Acrylonitrile & styrene Isobutylene & isoprene None of these
Answer Explanation

MCQs 12: Molecular weight of polymers are in the range of__________________?

10 to 103 102-107 107-109 109-1011
Answer Explanation

MCQs 13: Buna-N is also called__________________?

Butyl rubber Nitrile rubber Neoprene Thiokol
Answer Explanation

MCQs 14: Alkyd resin cannot be used for making_________________?

Plasticiser Paint & varnish Fibers Film forming materials
Answer Explanation

MCQs 15: Poly-methyl-methacrylate, which is an acrylic resin, is also called ___________________?

Thiokol Plexiglass or Lucite Dacron Teflon
Answer Explanation

MCQs 16: Vulcanisation of raw rubber makes it__________________?

Soft Less elastic Plastic Tacky
Answer Explanation

MCQs 17: Which of the following is not a polyolefin ?

Polystyrene Polypropylene Neoprene None of these
Answer Explanation

MCQs 18: Contact lenses for eyes are made of Perspex, which is nothing but_______________?

poly-methyl-methacrylate Polystyrene Unsaturated polyester Polypropylene
Answer Explanation

MCQs 19: Most of the plastics are safe to be used upto a maximum temperature of ______________ °C?

100 150 350 450
Answer Explanation

MCQs 20: Bristles of tooth brushes are made of_______________?

Nylon-6 Nylon-66 Polystyrene PVC
Answer Explanation

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