Discussion
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- Question
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
- Correct Answer
- 50000
- 1. __________ is produced by polymerisation of chloroprene.
Options- A. Thiokol (a polysulphide rubber)
- B. Butyl rubber
- C. Neoprene
- D. Polyurathane rubber Discuss
- 2. 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
- 3. Phthalic anhydride is used
Options- A. in making PVC
- B. as plasticisers
- C. in insecticides manufacture
- D. for making nylon-6 Discuss
- 4. The monomer of natural rubber is
Options- A. DMT
- B. isoprene
- C. 2 methyl-1-propene
- D. both (b) and (c) Discuss
- 5. Polycaprolactum is also known as
Options- A. nylon-66
- B. nylon-6
- C. teflon
- D. SBR Discuss
- 6. The starting material used for the manufacture of caprolactum is
Options- A. ethyl benzene
- B. cyclohexane
- C. ethylene glycol
- D. DMT Discuss
- 7. __________ is a copolymer.
Options- A. styrene butadiene rubber (SBR)
- B. Neoprene
- C. PVC
- D. None of these Discuss
- 8. 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) Discuss
- 9. 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
- 10. 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
Polymer Technology problems
Search Results
Correct Answer: Neoprene
Correct Answer: converts its plasticity into elasticity.
Correct Answer: as plasticisers
Correct Answer: both (b) and (c)
Correct Answer: nylon-6
Correct Answer: cyclohexane
Correct Answer: styrene butadiene rubber (SBR)
Correct Answer: either (b) or (c)
Correct Answer: dibasic acid with dihydric alcohol.
Correct Answer: thermosetting
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