Match the terms of column A correctly with the phrases given in column B. A B (i) Polyester (a) Prepared by using wood pulp (ii) Teflon (b) Used for making parachutes and stockings (iii) Rayon (c) Used to make non-stick cookware (iv) Nylon (d) Fabrics do not wrinkle easily

(i) Polyester d. Fabrics do not wrinkle easily Polyester is a synthetic fibre so it will not get wrinkled easily. Terylene is a popular polyester. (ii) Teflon c. Used to make non-stick cookware Teflon is used to make non-stick cookware. Teflon is a special plastic on which oil and water do not stick. It is used for non-stick coating on cookware. (iii) Rayon a. Prepared by using wood pulp Rayon is a synthetic fibre which is prepared by using wood pulp. This fibre is also called as artificial silk. (iv) Nylon b. Used for making parachutes and stockings Nylon fibres are strong so that it is used for making parachutes and stockings. Nylon fibre is strong, elastic and light. It is lustrous and easy to wash. A B (i) Polyester d. Fabrics do not wrinkle easily (ii)Teflon c. Used to make non-stick cookware (iii) Rayon a. Prepared by using wood pulp (iv) Nylon b. Used for making parachutes and stockings

E M B I B E

Science>Chapter 3 - Synthetic Fibres and Plastics>Exercises>Q 7

MEDIUM

8th Punjab Board

IMPORTANT

Earn 100

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

Important Questions on Synthetic Fibres and Plastics

MEDIUM

8th Punjab Board

IMPORTANT

Science>Chapter 3 - Synthetic Fibres and Plastics>Exercises>Q 8

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.

EASY

8th Punjab Board

IMPORTANT

Science>Chapter 3 - Synthetic Fibres and Plastics>Exercises>Q 9

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

MEDIUM

8th Punjab Board

IMPORTANT

Science>Chapter 3 - Synthetic Fibres and Plastics>Exercises>Q 10

Give examples to show that plastics are noncorrosive in nature.

MEDIUM

8th Punjab Board

IMPORTANT

Science>Chapter 3 - Synthetic Fibres and Plastics>Exercises>Q 11

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

MEDIUM

8th Punjab Board

IMPORTANT

Science>Chapter 3 - Synthetic Fibres and Plastics>Exercises>Q 12

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

EASY

8th Punjab Board

IMPORTANT

Science>Chapter 3 - Synthetic Fibres and Plastics>Exercises>Q 13

Match the terms of column A correctly with the phrases given in column B.

A	B
(i) Polyester	(a) Prepared by using wood pulp
(ii) Teflon	(b) Used for making parachutes and stockings
(iii) Rayon	(c) Used to make non-stick cookware
(iv) Nylon	(d) Fabrics do not wrinkle easily