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Total Questions : 1113 | Page 6 of 112 pages
Question 51. Pickout the wrong statement.
  1.    Polymers made of only one monomer is called homopolymer
  2.    Polymers made of more than one monomer is called copolymer or mixed polymer
  3.    Vulcanised rubber is more elastic than natural rubber
  4.    The intermoleculer forces in ther-mosplastic polymers are intermediate to that of elastomers & fibres
 Discuss Question
Answer: Option A. -> Polymers made of only one monomer is called homopolymer
Question 52. The monomer for the production of neoprene rubber is
  1.    Acetylene
  2.    Chloroprene
  3.    Isoprene
  4.    None of these
 Discuss Question
Answer: Option B. -> Chloroprene
Question 53. Due to its excellent permeability to air/gas and oxidation resistance, the tubes of automobile tyres is made of
  1.    Cold SBR
  2.    Butyl rubber
  3.    Bunai N
  4.    Buna S
 Discuss Question
Answer: Option B. -> Butyl rubber
Question 54. Which of the following is not a polyolefin?
  1.    Polystyrene
  2.    Polypropylene
  3.    Neoprene
  4.    None of these
 Discuss Question
Answer: Option C. -> Neoprene
Question 55. In nylon-66, the first and second numbers (i.e., 6) respectively designate the number of carbon atoms present in the
  1.    Hexamethylene diamine and the ring
  2.    Hexamethylene diamine and the adipic acid
  3.    Adipic acid and the ring
  4.    None of these
 Discuss Question
Answer: Option B. -> Hexamethylene diamine and the adipic acid
Question 56. Which of the following is not an elastomer?
  1.    Polyisoprene
  2.    Neoprene
  3.    Nitrile-butadiene
  4.    None of these
 Discuss Question
Answer: Option D. -> None of these
Question 57. Which of the following natural bio polymers are formed as a result of polymerisation of amino-acids?
  1.    Starch
  2.    Cellulose
  3.    Proteins
  4.    Nucleic acids
 Discuss Question
Answer: Option C. -> Proteins
Question 58. Polymerisation of poly functional monomers produces polymers having
  1.    Good machanical strength
  2.    Low viscosity
  3.    Low melting point
  4.    None of these
 Discuss Question
Answer: Option A. -> Good machanical strength
Question 59. Typical solvent polymerisation reaction conditions for the production of high density polythene by Zeigler process is
  1.    7 kgf/cm² and 70 °C
  2.    1000 kgf/cm² and 100°C
  3.    7 kgf/cm² and 700°C
  4.    1 kgf/cm² (gage) and 70°C
 Discuss Question
Answer: Option A. -> 7 kgf/cm² and 70 °C
Question 60. The generic chemical name for the class of polymers which are commerically known as nylons is
  1.    Polyolefins
  2.    Polyamide
  3.    Polyacrylate
  4.    Polyurathane
 Discuss Question
Answer: Option B. -> Polyamide

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