Science

Synthetic Fibres and Plastics

Question:

Avoid plastics as far as possible'. Comment on this advice.

Answer:

Plastics are non-biodegradable. Once introduced into the environment they take several years to decompose. Plastics add to the environmental pollution. They cannot be burnt as when burnt they release poisonous gases. Plastic bags thrown in the garbage dump are swallowed by animals like cows. These plastic bags choke their respiratory system and can even prove fatal. Therefore, we should avoid plastics as far as possible.
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Questions and Answers

Synthetic Fibres and Plastics

Q 1.

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

Q 2.

Explain why some fibres are called synthetic.
Answer

Q 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

Q 4.

Give examples which indicate that nylon fibres are very strong.
Answer

Q 5.

Explain the difference between thermoplastic and thermosetting plastics.
Answer

Q 6.

Explain why plastic containers are favoured for storing food.
Answer

Q 7.

Should the handle and bristles of a tooth brush be made of the same material? Explain your answer.
Answer

Q 8.

Explain why the following are made of thermosetting plastics. (a) Saucepan handles (b) Electric plugs/switches/plug boards
Answer

Q 9.

Give examples to show that plastics are non-corrosive in nature.
Answer

Q 10.

Describe an activity to show that thermoplastic is a poor conductor of electricity.
Answer

Q 11.

Manufacturing synthetic fibres is actually helping conservation of forests'. Comment.
Answer

Q 12.

Avoid plastics as far as possible'. Comment on this advice.
Answer