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MCQs

Total Questions : 1113 | Page 19 of 112 pages
Question 181. Reaction of dimethyl terephthalate (DMT) and ethylene glycol produces
  1.    Nylon-6
  2.    Dacron
  3.    Polyester
  4.    PVC
 Discuss Question
Answer: Option B. -> Dacron
Question 182. Polystyrene is a __________ plastic at room temperature.
  1.    Ductile
  2.    Brittle
  3.    Malleable
  4.    None of these
 Discuss Question
Answer: Option B. -> Brittle
Question 183. __________ is a thermosetting plastic.
  1.    PVC
  2.    Polythene
  3.    Bakelite
  4.    Polystyrene
 Discuss Question
Answer: Option C. -> Bakelite
Question 184. Condensation polymerisation of caprolac-tum is carried out in the reactor maintained at a temperature of __________ °C for producing nylon-6.
  1.    -20 to 25
  2.    50 to 75
  3.    100 to 150
  4.    250-280
 Discuss Question
Answer: Option D. -> 250-280
Question 185. __________ is an addition polymer
  1.    Nylon
  2.    Bakelite
  3.    Polythene
  4.    None of these
 Discuss Question
Answer: Option C. -> Polythene
Question 186. The synthetic fibres produced from __________ are known as rayon.
  1.    Lignin
  2.    Cellulose
  3.    Polyamides
  4.    Ethylene glycol
 Discuss Question
Answer: Option B. -> Cellulose
Question 187. __________ is a natural fibre.
  1.    Cellulose
  2.    Dacron
  3.    Nylon-6
  4.    None of these
 Discuss Question
Answer: Option A. -> Cellulose
Question 188. Plasticisers are added to synthetic plastics to
  1.    Impart flexibility
  2.    Improve workability during fabrication
  3.    Develop new improved properties not present in the original resin
  4.    All of the above
 Discuss Question
Answer: Option D. -> All of the above
Question 189. Plexiglass (also called lucite) because of its high optical transparency is used for making lenses. It is chemically
  1.    Polymethyl methacrylate (PMMA)
  2.    Polytetraflouroethylene(PTFE)
  3.    Polycarbonates
  4.    Phenolic resins
 Discuss Question
Answer: Option A. -> Polymethyl methacrylate (PMMA)
Question 190. Alkyd resin is a/an
  1.    Polyamide
  2.    Polyester
  3.    Polyolefin
  4.    Addition polymer
 Discuss Question
Answer: Option B. -> Polyester

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