Discussion
Home ‣ Chemical Engineering ‣ Polymer Technology Comments
- Question
Properties of a polymer is affected by the
Options- A. chain length.
- B. intermolecular forces.
- C. branching & cross-linking.
- D. all (a), (b).
- Correct Answer
- all (a), (b).
- 1. 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
- 2. 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
- 3. Poly tetra flouro ethylene (PTFE) is known as
Options- A. dacron
- B. teflon
- C. bakelite
- D. celluloid Discuss
- 4. 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
- 5. Cellulose content in bomboo fibre is about __________ percent.
Options- A. 10
- B. 20
- C. 50
- D. 85 Discuss
- 6. Vulcanisation of rubber does not increase its
Options- A. elasticity
- B. plasticity
- C. ductility
- D. none of these Discuss
- 7. Synthetic rubber
Options- A. deforms, if stretched to double of its original dimension.
- B. is brittle at low temperature
- C. is softer at higher temperature.
- D. is highly permeable to air & water and is readily attacked by chemicals & atmospheric gases. Discuss
- 8. Bakelite is
Options- A. same as polytetra flouro ethylene (PTFE).
- B. an inorganic polymer.
- C. same as thermoset phenol formaldehyde.
- D. not a polymer. Discuss
- 9. Unbreakable crockeries are made from __________ polymers.
Options- A. polystyrene
- B. melamine
- C. polystyrene
- D. polyurathane Discuss
- 10. Condensation polymerisation of caprolac-tum is carried out in the reactor maintained at a temperature of __________ °C for producing nylon-6.
Options- A. -20 to 25
- B. 50 to 75
- C. 100 to 150
- D. 250-280 Discuss
Polymer Technology problems
Search Results
Correct Answer: none of these.
Correct Answer: polyamide
Correct Answer: teflon
Correct Answer: the monomers contain two functional groups.
Correct Answer: 50
Correct Answer: plasticity
Correct Answer: is highly permeable to air & water and is readily attacked by chemicals & atmospheric gases.
Correct Answer: same as thermoset phenol formaldehyde.
Correct Answer: melamine
Correct Answer: 250-280
Comments
There are no comments.More in Chemical Engineering:
Programming
Copyright ©CuriousTab. All rights reserved.