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

Polyester fabrics do not wrinkle easily. It is a synthetic fibre that contains many ester groups. Teflon is used for non-stick coating on cookware. It is a thermoplastic material. Rayon is obtained by the chemical treatment of wood pulp or cellulose. It is a semi-synthetic fibre. Nylon fibres are very strong. So, it is used for making parachutes. It is the first fully synthetic fibre made by man without using any natural raw material. Column A Column 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

E M B I B E

Start Up Science>Chapter 3 - Synthetic Fibres and Plastic>Some Questions from NCERT>Q 7

MEDIUM

8th CBSE

IMPORTANT

Earn 100

Explain why the saucepan handles are made of thermosetting plastics.

Important Questions on Synthetic Fibres and Plastic

MEDIUM

8th CBSE

IMPORTANT

Start Up Science>Chapter 3 - Synthetic Fibres and Plastic>Some Questions from NCERT>Q 7

Explain why the following are made of thermosetting plastics.
Electric plugs/ switches/ plug boards.

MEDIUM

8th CBSE

IMPORTANT

Start Up Science>Chapter 3 - Synthetic Fibres and Plastic>Some Questions from NCERT>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 CBSE

IMPORTANT

Start Up Science>Chapter 3 - Synthetic Fibres and Plastic>Some Questions from NCERT>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 CBSE

IMPORTANT

Start Up Science>Chapter 3 - Synthetic Fibres and Plastic>Some Questions from NCERT>Q 10

Give a few examples which suggest plastics are non-corrosive in nature.

MEDIUM

8th CBSE

IMPORTANT

Start Up Science>Chapter 3 - Synthetic Fibres and Plastic>Some Questions from NCERT>Q 11

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

HARD

8th CBSE

IMPORTANT

Start Up Science>Chapter 3 - Synthetic Fibres and Plastic>Some Questions from NCERT>Q 12

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

MEDIUM

8th CBSE

IMPORTANT

Start Up Science>Chapter 3 - Synthetic Fibres and Plastic>Some Questions from NCERT>Q 13

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

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