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Chemical Engineering
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Polymer Technology
Comments
Question
Which of the following is an inorganic polymer?
Options
A. Teflon
B. Perspex
C. Silicones
D. Bakelite
Correct Answer
Silicones
Polymer Technology problems
Search Results
1. Poly Vinyl chloride (PVC) is a __________ material.
Options
A. thermoplastic
B. thermosetting
C. fibrous
D. chemically active
Show Answer
Scratch Pad
Discuss
Correct Answer: thermoplastic
2. Contact lenses for eyes are made of perspex, which is nothing but
Options
A. polymethylmethacrylate
B. polystyrene
C. unsaturated polyester
D. polypropylene
Show Answer
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Discuss
Correct Answer: polymethylmethacrylate
3. The inter particle forces between linear chains in nylon-66 are __________ bonds.
Options
A. hydrogen
B. covalant
C. ionic
D. none of these
Show Answer
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Discuss
Correct Answer: hydrogen
4. Which of the following is an elastomer?
Options
A. Thiokol
B. Phenol formaldehyde
C. Urea formaldehyde
D. Polystyrene
Show Answer
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Discuss
Correct Answer: Thiokol
5. 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.
Show Answer
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Discuss
Correct Answer: Phenol manufacture by chlorobenzene-caustic process is competitive even when low cost chlorine is not available.
6. 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).
Show Answer
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Discuss
Correct Answer: all (a), (b) and (c).
7. Temperature and gage pressure maintained during the manufacture of hot SBR (styrene butediene rubber) are
Options
A. 50°C and 3 - 4 kg/cm
2
B. 50°C and 1 kgf/cm
2
C. 250°C and 10 kgf/cm
2
D. 250°C and 1 kgf/cm
2
Show Answer
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Discuss
Correct Answer: 50°C and 3 - 4 kg/cm
2
8. 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
Show Answer
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Discuss
Correct Answer: 90
9. Polyurathane can not be used for making
Options
A. mattresses & foam
B. coating material
C. adhesives
D. bottles
Show Answer
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Discuss
Correct Answer: bottles
10. Main constituent of cotton fibre is
Options
A. lignin
B. cellulose
C. starch
D. gelatine
Show Answer
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Discuss
Correct Answer: cellulose
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