Polymer Technology problems
- 1. Neoprene is rendered non-inflammable, because of
Options- A. its cross-linked structure.
- B. its linear chain structure.
- C. the presence of chlorine atoms in its monomer.
- D. the absence of chlorine atoms in its monomer. Discuss
Correct Answer: the presence of chlorine atoms in its monomer.
- 2. Branched chair polymers as compared to linear polymers have
Options- A. higher melting point.
- B. higher tensile strength.
- C. lower density.
- D. none of these. Discuss
Correct Answer: lower density.
- 3. Flexible foam (for mattresses) are usually made of
Options- A. PVC
- B. silicone rubber
- C. polyurethanes
- D. polyamides Discuss
Correct Answer: polyurethanes
- 4. Addition of stabiliser during PVC manufacture is done to
Options- A. improve its impact strength.
- B. improve its elasticity.
- C. reduce the melt viscosity & glass transition temperature.
- D. prevent its thermal degradation. Discuss
Correct Answer: prevent its thermal degradation.
- 5. __________ fibres are made of polyamides.
Options- A. Dacron
- B. Nylon
- C. Rayon
- D. Orion Discuss
Correct Answer: Nylon
- 6. Condensation polymerisation of formaldehyde with __________ does not produce phenolic resin.
Options- A. resorcinol
- B. phenol
- C. para-cresol
- D. melamine Discuss
Correct Answer: melamine
- 7. Nylon-6 as compared to nylon-66 is
Options- A. harder.
- B. more abrasion resistant.
- C. having higher melting point.
- D. none of these. Discuss
Correct Answer: none of these.
- 8. __________ is a copolymer.
Options- A. Nylon-66
- B. Polyrophylene
- C. PVC
- D. Poly tetra flouro ethylene Discuss
Correct Answer: Nylon-66
- 9. Which of the following polymers shows the highest anti-tacking properties?
Options- A. Melamine formaldehyde resin
- B. Phenolic resin
- C. Epoxy resin
- D. Alkyd resin Discuss
Correct Answer: Melamine formaldehyde resin
- 10. ? - glucose is the monomer of
Options- A. cellulose
- B. starch
- C. protein
- D. none of these Discuss
Correct Answer: cellulose
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