en like those of natural libres. Fill in the blanks with appropriate words. (a) Synthetic fibres are also called Or fibres (b) Synthetic fibres are synthesised from raw material called (c) Like synthetic fibres, plastic is also a 4. Give examples which indicate that nylon fibres are very strong. 5. Explain why plastic containers are favoured for storing food. 6., Explain the difference between thermoplastic and thermosetting plastics. 7. Explain why the following are made of thermosetting plastics. (a) Saucepan handles (b) Electric plugs/switches/plug boards 8. Categorise the materials of the following products into 'can be recycled and cannot be recycled'.
Answers
Answer:
a) artificial
b) petrochemicals
c) polymer
4.Nylon is used in making parachutes. It is used in making ropes for rock climbing.
5) because plastic is non-reactive and will not react with the ingredients of the food items.
6) this question is answer is attached as a picture
7) a) Thermosetting plastics are used in saucepan handles because they do not soften on heating and also they cannot be bent easily.
b) Thermosetting plastics are used in electric plugs/switches/plug boards as they are bad conductors of electricity. They do not get moulded.
8)Categorise the materials of the following products into 'can be recycled' ... Can be Recycled : Toys, carry bags, plastic bowls, ball point pens, plastic chairs, plastic covering on electrical wires. Cannot be Recycled : Cooker handles, electrical switches, telephone instruments.
Explanation:
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