science - synthetic fibres and plastics

Class 8 - Science

Synthetic Fibres and Plastics

Q&A
Question:
Explain why plastic containers are favoured for storing food.
Answer:

The characteristics that make plastics favourable for storing food items are:(i) Light weight (ii) Lower price (iii) Good strength (iv) Easy handling

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Questions and Answers


Synthetic Fibres and Plastics - Questions
1. Explain the difference between thermoplastic and thermosetting plastics.
Answer
2. Explain why some fibres are called synthetic.
Answer
3. Rana wants to buy shirts for summer. Should he buy cotton shirts or shirts made from synthetic material? Advise Rana, giving your reason.
Answer
4. Categorize the materials of the following products into 'can be recycled' and 'cannot be recycled'. Telephone instruments, plastic toys, cooker handles, carry bags, ball point pens, plastic bowls, plastic covering on electrical wires, plastic chairs, electrical switches.
Answer
5. Give examples which indicate that nylon fibres are very strong.
Answer
6. Should the handle and bristles of a tooth brush be made of the same material? Explain your answer.
Answer
7. Explain why the following are made of thermosetting plastics. (a) Saucepan handles (b) Electric plugs/switches/plug boards
Answer
8. Explain why plastic containers are favoured for storing food.
Answer
9. Describe an activity to show that thermoplastic is a poor conductor of electricity.
Answer
10. Give examples to show that plastics are non-corrosive in nature.
Answer
11. Manufacturing synthetic fibres is actually helping conservation of forests'. Comment.
Answer
12. Avoid plastics as far as possible'. Comment on this advice.
Answer
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