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

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

Q. Give examples to show that plastics don't corrode easily.

Q. Explain why the following are made of thermosetting plastics.

Q. Explain why some fibres are called synthetic.

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

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

Q. Explain the difference between the thermoplastic and thermosetting plastics.

Q. Explain why plastic containers are favoured for storing food?

Q. Rana wants to buy shirts for summer. Should he buy cotton shirts or shirts made from synthetic material? Advise Rana, giving your reason.

Q. Match the polymers given, in column I correctly with their respective properties or uses given in column II.

Q. Mark the correct answer.

Q. Categorise 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.

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

Q. Fill in the blanks with appropriate words: