EXERCISES
A. Choose the most appropriate answer
1. Which of these is a libre derived from chemical
u rayon
b. cotton
2. Which of these is a thermosetting plastie?
a. polystyrene b. bakelite
polythene
3. Which of these plastics is a polymer?
a bakelite
b. polystyrene polythene
4. Which of these plastics can be repeatedly heated and moulded in any
a. bakelite
b. polythene
5. Which of these can you use as a substitute for glass in Window?
a. polythene b. PVC
c. perspex
6. Which of these is not a property of plasties?
a. bad conductor of heat
b. bad conductor of de
c. inflammable
d. soluble in water
B. Answer the questions in one word.
Answers
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Answer:
- all have to do..............
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