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MCQs

Total Questions : 515 | Page 52 of 52 pages
Question 511. Polycaprolactum (Nylon - 6) is produced by the condensation polymerisation of caprolactum at 240-280°C in which the conversion of caprolactum is about __________ percent.
  1.    50
  2.    75
  3.    90
  4.    99
 Discuss Question
Answer: Option C. -> 90
Answer: (c).90
Question 512. Viscose rayon is
  1.    cellulose nitrate
  2.    regenerated cellulose nitrate
  3.    regenerated cellulose acetate
  4.    none of these
 Discuss Question
Answer: Option D. -> none of these
Answer: (d).none of these
Question 513. Pick out the wrong statement.
  1.    For the manufacture of styrene, the major raw materials are benzene and ethylene.
  2.    One inportant copolymer of styrene is SBR, which is widely used in the manufacture of automobile tyres.
  3.    Manufacture of phenol by chloroben-zene-eaustic process involves. The chlorination of benzene, causticisation and hydrolysis.
  4.    Phenol manufacture by chlorobenzene-caustic process is competitive even when low cost chlorine is not available.
 Discuss Question
Answer: Option D. -> Phenol manufacture by chlorobenzene-caustic process is competitive even when low cost chlorine is not available.
Answer: (d).Phenol manufacture by chlorobenzene-caustic process is competitive even when low cost chlorine is not available.
Question 514. Hot drink (e.g, tea) cups are usually made of
  1.    polystyrene
  2.    polythene
  3.    polypropylene
  4.    PVC
 Discuss Question
Answer: Option A. -> polystyrene
Answer: (a).polystyrene
Question 515. Polyurathane can not be used for making
  1.    mattresses & foam
  2.    coating material
  3.    adhesives
  4.    bottles
 Discuss Question
Answer: Option D. -> bottles
Answer: (d).bottles

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