A. Choose the most appropriate answer.
1. Which of these is a natural fibre?
a. rayon
b. cotton
c. nylon
d. polyester
2. Which of these is a fibre derived from chemicals?
a. rayon
b. cotton
c. nylon
d. silk
3. Which of these fibres is made from a raw material obtained from Pau
a. rayon
b. nylon
c. terylene
d. polyester
4. Which of these is a thermosetting plastic?
a. polystyrene
b. bakelite
c. polythene
d. polyvinyl chloride
. Which of these plastics is a polymer?
a. bakelite
b. polystyrene
c. polythene
d. all of these
Which of these plastics can be repeatedly heated and moulded into any desired shape?
a. bakelite
b. polythene
c. formica
d. melamine
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Answer:
1.b.cotton
2.c.nylon
3.a.rayon
4.b.bakelite
5.d. all of these
5.b.polythene
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