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MCQs

Total Questions : 1113 | Page 107 of 112 pages
Question 1061. Vulcanisation of rubber_____________________?
  1.    Decreases its tensile strength
  2.    Increases its ozone & oxygen reactivity
  3.    Increases its oil & solvent resistance
  4.    Converts its plasticity into elasticity
 Discuss Question
Answer: Option D. -> Converts its plasticity into elasticity
NO EXPLANATION IS AVAILABLE FOR THIS QUESTION!
Question 1062. Trade name of ______________ is neoprene?
  1.    Polychlorophrene
  2.    Polyisoprene
  3.    Polytetrafluoroethylene
  4.    Poly vinyl acetate
 Discuss Question
Answer: Option A. -> Polychlorophrene
NO EXPLANATION IS AVAILABLE FOR THIS QUESTION!
Question 1063. _____________ polymer is produced by the copolymerisation of vinyl chloride-vinyl acetate?
  1.    Fibrous
  2.    Leathery
  3.    Rubbery
  4.    Hard
 Discuss Question
Answer: Option B. -> Leathery
NO EXPLANATION IS AVAILABLE FOR THIS QUESTION!
Question 1064. _____________ tubes are good substitute for human blood vessels on heart by-pass operation?
  1.    PVC
  2.    Polythene
  3.    Teflon/Dacron
  4.    Polystyrene
 Discuss Question
Answer: Option C. -> Teflon/Dacron
NO EXPLANATION IS AVAILABLE FOR THIS QUESTION!
Question 1065. Molecular weight of a polymer is equal to the molecular weight of the repeat unit multiplied by the degree of polymerisation. What is the molecular weight of poly vinyl chloride (PVC), if its degree of polymerisation is 800 ?
  1.    50000
  2.    51600
  3.    49200
  4.    50800
 Discuss Question
Answer: Option A. -> 50000
NO EXPLANATION IS AVAILABLE FOR THIS QUESTION!
Question 1066. Visco-elastic behaviour exhibited by plastics is a ______________ like behaviour?
  1.    Solid
  2.    Liquid
  3.    Combination of solid & liquid
  4.    Neither solid nor liquid
 Discuss Question
Answer: Option C. -> Combination of solid & liquid
NO EXPLANATION IS AVAILABLE FOR THIS QUESTION!
Question 1067. Benzoyl chloride is not used as a catalyst in the manufacture of___________________?
  1.    Polystyrene
  2.    Polyvinyl acetate
  3.    Polypropylene
  4.    Polyvinyl chloride-co-vinyl acetate
 Discuss Question
Answer: Option C. -> Polypropylene
NO EXPLANATION IS AVAILABLE FOR THIS QUESTION!
Question 1068. Linear polymers are normally_________________?
  1.    Thermosetting
  2.    Thermoplastic
  3.    Elastometric
  4.    Having extremely high softening point
 Discuss Question
Answer: Option B. -> Thermoplastic
NO EXPLANATION IS AVAILABLE FOR THIS QUESTION!
Question 1069. Condensation polymerisation is not involved in the manufacture of_________________?
  1.    Teflon
  2.    Polythene
  3.    Terylene
  4.    Nylon
 Discuss Question
Answer: Option B. -> Polythene
NO EXPLANATION IS AVAILABLE FOR THIS QUESTION!
Question 1070. The repeating units of PTFE are___________________?
  1.    Cl2CH-CH3
  2.    F2 C = CF2
  3.    F3 C-CF3
  4.    FClC = CF2
 Discuss Question
Answer: Option B. -> F2 C = CF2
NO EXPLANATION IS AVAILABLE FOR THIS QUESTION!

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