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Polymer Technology
Comments
Question
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.
Correct Answer
more brittle.
Polymer Technology problems
Search Results
1. 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.
Show Answer
Scratch Pad
Discuss
Correct Answer: an isomer of natural rubber.
2. 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
Show Answer
Scratch Pad
Discuss
Correct Answer: 10
-2
to 10
-5
3. Which of the following has the weakest intermolecular forces?
Options
A. Polyisoprene
B. Nylon-66
C. Polystyrene
D. Bakelite
Show Answer
Scratch Pad
Discuss
Correct Answer: Polyisoprene
4. In nylon-6, the number 6 represents the total number of
Options
A. carbon atoms in the ring.
B. carbon atoms in the linear polymer chain.
C. nitrogen atoms in the ring.
D. hydrogen atoms in the ring.
Show Answer
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Discuss
Correct Answer: carbon atoms in the linear polymer chain.
5. __________ is normally used for the manufacture of refrigerator components and transistor parts.
Options
A. Polyproylene
B. Polystyrene
C. Polyester
D. Polyurathene
Show Answer
Scratch Pad
Discuss
Correct Answer: Polystyrene
6. 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.
Show Answer
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Discuss
Correct Answer: cross linked polystyrene.
7. Cellulose content in bomboo fibre is about __________ percent.
Options
A. 10
B. 20
C. 50
D. 85
Show Answer
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Discuss
Correct Answer: 50
8. 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
Show Answer
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Discuss
Correct Answer: the monomers contain two functional groups.
9. Poly tetra flouro ethylene (PTFE) is known as
Options
A. dacron
B. teflon
C. bakelite
D. celluloid
Show Answer
Scratch Pad
Discuss
Correct Answer: teflon
10. 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
Show Answer
Scratch Pad
Discuss
Correct Answer: polyamide
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