Polymer Technology problems
- 1. In case of dry spinning of polymers, the polymer solution in a volatile solvent is forced through the spinnerates into a warm air chamber, where the solvent evaporates leaving behind the polymer in the filament form. Dry spinning is used for __________ fibres.
Options- A. polythene
- B. PVC
- C. rayon
- D. polyvinyl acetate Discuss
Correct Answer: PVC
- 2. Benzoyl chloride is not used as a catalyst in the manufacture of
Options- A. polystyrene
- B. polyvinyl acetate
- C. polypropylene
- D. polyvinyl chloride-co-vinylacetate Discuss
Correct Answer: polypropylene
- 3. Polythene is a/an
Options- A. addition polymerisation product.
- B. condensation polymerisation product.
- C. thermosetting material.
- D. none of these. Discuss
Correct Answer: addition polymerisation product.
- 4. Teflon is
Options- A. phenol formaldehyde
- B. an inorganic polymer
- C. polytetra florouethylene (PTFE)
- D. a monomer Discuss
Correct Answer: polytetra florouethylene (PTFE)
- 5. Polycaprolactum is also known as
Options- A. nylon-66
- B. nylon-6
- C. teflon
- D. SBR Discuss
Correct Answer: nylon-6
- 6. The monomer of natural rubber is
Options- A. DMT
- B. isoprene
- C. 2 methyl-1-propene
- D. both (b) and (c) Discuss
Correct Answer: both (b) and (c)
- 7. Phthalic anhydride is used
Options- A. in making PVC
- B. as plasticisers
- C. in insecticides manufacture
- D. for making nylon-6 Discuss
Correct Answer: as plasticisers
- 8. 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
Correct Answer: converts its plasticity into elasticity.
- 9. __________ is produced by polymerisation of chloroprene.
Options- A. Thiokol (a polysulphide rubber)
- B. Butyl rubber
- C. Neoprene
- D. Polyurathane rubber Discuss
Correct Answer: Neoprene
- 10. 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
Correct Answer: 50000
More in Chemical Engineering:
Programming
Copyright ©CuriousTab. All rights reserved.