E. Short answer type questions:
1. Why did synthetic fibres come into existence?
2. What are the types of polymers?
3. Give some uses of rayon.
4. Explain the difference between thermosetting and thermoplastics.
5. What are the characteristic of plastics?
Long answer type questions:
1. Write various types of synthetic fibres and their uses.
2. What are the preventive measures that need to be taken to prevent harm from plastics
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Answer:
3. it is artificial silk
Long 1.
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