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- Question
Contact lenses for eyes are made of perspex, which is nothing but
Options- A. polymethylmethacrylate
- B. polystyrene
- C. unsaturated polyester
- D. polypropylene
- Correct Answer
- polymethylmethacrylate
- 1. The inter particle forces between linear chains in nylon-66 are __________ bonds.
Options- A. hydrogen
- B. covalant
- C. ionic
- D. none of these Discuss
- 2. Which of the following is an elastomer?
Options- A. Thiokol
- B. Phenol formaldehyde
- C. Urea formaldehyde
- D. Polystyrene Discuss
- 3. Pick out the wrong statement.
Options- A. For the manufacture of styrene, the major raw materials are benzene and ethylene.
- B. One inportant copolymer of styrene is SBR, which is widely used in the manufacture of automobile tyres.
- C. Manufacture of phenol by chloroben-zene-eaustic process involves. The chlorination of benzene, causticisation and hydrolysis.
- D. Phenol manufacture by chlorobenzene-caustic process is competitive even when low cost chlorine is not available. Discuss
- 4. Liners of bags are usually made of
Options- A. polythene
- B. PVC
- C. polypropylene
- D. polyesters Discuss
- 5. __________ moulding is used for shaping of thermosetting plastics exclusively.
Options- A. Compression
- B. Injection
- C. Transfer
- D. Extrusion Discuss
- 6. Poly Vinyl chloride (PVC) is a __________ material.
Options- A. thermoplastic
- B. thermosetting
- C. fibrous
- D. chemically active Discuss
- 7. Which of the following is an inorganic polymer?
Options- A. Teflon
- B. Perspex
- C. Silicones
- D. Bakelite Discuss
- 8. The physical state in which polymers exist is
Options- A. melts & rubber like state.
- B. amorphous glassy state.
- C. partially crystalline state.
- D. all (a), (b) and (c). Discuss
- 9. Temperature and gage pressure maintained during the manufacture of hot SBR (styrene butediene rubber) are
Options- A. 50°C and 3 - 4 kg/cm2
- B. 50°C and 1 kgf/cm2
- C. 250°C and 10 kgf/cm2
- D. 250°C and 1 kgf/cm2 Discuss
- 10. Polycaprolactum (Nylon - 6) is produced by the condensation polymerisation of caprolactum at 240-280°C in which the conversion of caprolactum is about __________ percent.
Options- A. 50
- B. 75
- C. 90
- D. 99 Discuss
Polymer Technology problems
Search Results
Correct Answer: hydrogen
Correct Answer: Thiokol
Correct Answer: Phenol manufacture by chlorobenzene-caustic process is competitive even when low cost chlorine is not available.
Correct Answer: polypropylene
Correct Answer: Transfer
Correct Answer: thermoplastic
Correct Answer: Silicones
Correct Answer: all (a), (b) and (c).
Correct Answer: 50°C and 3 - 4 kg/cm2
Correct Answer: 90
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