Discussion
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- Question
Thermocole is a spongy, porous, rigid or flexible foamed plastic, obtained by blowing gas/air through molten
Options- A. saturated polyester
- B. polyurathane
- C. polystyrene
- D. either (b) or (c)
- Correct Answer
- either (b) or (c)
- 1. __________ is a copolymer.
Options- A. styrene butadiene rubber (SBR)
- B. Neoprene
- C. PVC
- D. None of these Discuss
- 2. The starting material used for the manufacture of caprolactum is
Options- A. ethyl benzene
- B. cyclohexane
- C. ethylene glycol
- D. DMT Discuss
- 3. 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?
Options- A. 50000
- B. 51600
- C. 49200
- D. 50800 Discuss
- 4. __________ is produced by polymerisation of chloroprene.
Options- A. Thiokol (a polysulphide rubber)
- B. Butyl rubber
- C. Neoprene
- D. Polyurathane rubber Discuss
- 5. Vulcanisation of rubber
Options- A. decreases its tensile strength.
- B. increases its ozone & oxygen reactivity.
- C. increases its oil & solvent resistance.
- D. converts its plasticity into elasticity. Discuss
- 6. Polyesters are manufactured by the polycondensation reaction of
Options- A. dibasic acid with dihydric alcohol.
- B. a single monomer.
- C. carboxylic acid with ethylene.
- D. inorganic acid with ethylene glycol. Discuss
- 7. Polymethyl methacrylate (PMMA) which is also known as perspex and is produced by bulk polymerisation of methyl methacrylate is not a __________ polymer.
Options- A. thermoplastic
- B. thermosetting
- C. linear
- D. glass like transparent Discuss
- 8. Softening point of high density polythene is about __________ °C.
Options- A. 85
- B. 135
- C. 165
- D. 205 Discuss
- 9. Collapsible tubes for tooth paste are produced by __________ extrusion.
Options- A. direct
- B. indirect
- C. impact
- D. none of these Discuss
- 10. Rayon is a __________ fibre.
Options- A. cellulosic
- B. polyamide
- C. polyester
- D. natural Discuss
Polymer Technology problems
Search Results
Correct Answer: styrene butadiene rubber (SBR)
Correct Answer: cyclohexane
Correct Answer: 50000
Correct Answer: Neoprene
Correct Answer: converts its plasticity into elasticity.
Correct Answer: dibasic acid with dihydric alcohol.
Correct Answer: thermosetting
Correct Answer: 135
Correct Answer: impact
Correct Answer: cellulosic
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