Discussion
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- Question
Cellulose content in bomboo fibre is about __________ percent.
Options- A. 10
- B. 20
- C. 50
- D. 85
- Correct Answer
- 50
- 1. In step growth polymerisation, generally only one type of reaction & some basic mechanism is involved. Step growth polymerisation reaction is not involved in the manufacture of
Options- A. cross linked polystyrene.
- B. phenol formaldehyde resins.
- C. polyesters.
- D. polyamides. Discuss
- 2. Thermosetting resins/polymers as compared to thermoplastic ones are
Options- A. soluble in all organic solvents.
- B. more brittle.
- C. formed by addition polymerisation only.
- D. easily reshaped & reused. Discuss
- 3. Gutta parcha rubber is
Options- A. soft & tacky at room temperature.
- B. an isomer of natural rubber.
- C. a thermosetting resin.
- D. recovered by coagulation of rubber latex. Discuss
- 4. Size range of polymer molecules varies from __________ metre.
Options- A. 10-2 to 10-5
- B. 10-4 to 10-7
- C. 10-1 to 10-2
- D. 10-8 to 10-10 Discuss
- 5. Which of the following has the weakest intermolecular forces?
Options- A. Polyisoprene
- B. Nylon-66
- C. Polystyrene
- D. Bakelite Discuss
- 6. In condensation polymerisation as compared to addition polymerisation
Options- A. the monomers are unsaturated compounds.
- B. no co-product is lost.
- C. the monomers contain two functional groups.
- D. generally only one monomer is involved Discuss
- 7. Poly tetra flouro ethylene (PTFE) is known as
Options- A. dacron
- B. teflon
- C. bakelite
- D. celluloid Discuss
- 8. The generic chemical name for the class of polymers which are commerically known as nylons is
Options- A. polyolefins
- B. polyamide
- C. polyacrylate
- D. polyurathane Discuss
- 9. Thermosplastic materials
Options- A. do not soften on application of heat.
- B. are heavily branched molecules.
- C. are solvent insoluble.
- D. none of these. Discuss
- 10. Properties of a polymer is affected by the
Options- A. chain length.
- B. intermolecular forces.
- C. branching & cross-linking.
- D. all (a), (b). Discuss
Polymer Technology problems
Search Results
Correct Answer: cross linked polystyrene.
Correct Answer: more brittle.
Correct Answer: an isomer of natural rubber.
Correct Answer: 10-2 to 10-5
Correct Answer: Polyisoprene
Correct Answer: the monomers contain two functional groups.
Correct Answer: teflon
Correct Answer: polyamide
Correct Answer: none of these.
Correct Answer: all (a), (b).
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