MCQ-Questions-for-Class-8-Science-Synthetic-Fibres-and-Plastics
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If you want MCQ Questions for Class 8 Science Chapter 3 Synthetic Fibres and Plastics then you can get them here that helps the students to test their knowledge. It is an effective way to reinforce what students have learned and prepare for a quiz by building their confidence.

These Chapter 3 Class 8 Science MCQ Questions are an excellent tool for helping students understand the material they are studying.

Chapter 3 Synthetic Fibres and Plastics Class 8 Science MCQ Questions

1. Wire made from which fibre is strongest:
(a) nylon
(b) cotton
(c) wool
(d) steel
▶ (a) nylon

2. Which of the following is not thermoplastics?
(a) acrylic
(b) polyethylene
(c) polystyrene
(d) melamine
▶ (d) melamine

3. Which of the following is used in endoscopy?
(a) Optical fibres
(b) Glass fibres
(c) Glass wool
(d) None of these
▶ (a) Optical fibres

4. Photochromic glass contains:
(a) Silver bormide
(b) Silver iodide
(c) Silver chloride
(d) All of these
▶ (d) All of these

5. PET is form of:
(a) steel
(b) glass
(c) polyester
(d) nylon
▶ (c) polyester

6. Which of the following is used for making parachutes and stockings?
(a) polyester
(b) teflon
(c) rayon
(d) nylon
▶ (d) nylon

7. Purple-blue coloured glass is obtained by the addition of –
(a) Chromium salts
(b) Ferrous oxide
(c) Cobalt salts
(d) None of these
▶ (c) Cobalt salts

8. Which of the following is used to make non-stick cookwares?
(a) polyester
(b) teflon
(c) rayon
(d) nylon
▶ (b) teflon

9. Polyester is made of repeating units of chemical called as:
(a) Ester
(b) Cotton
(c) Ether
(d) None of these
▶ (a) Ester

10. Wood pulp is used for preparation of:
(a) polyester
(b) teflon
(c) rayon
(d) nylon
▶ (c) rayon

11. Terra Cotta is:
(a) Kaolin
(b) Clay
(c) Unglazed primitive pottey
(d) Porcelain
▶ (c) Unglazed primitive pottey

12. Thermocole is made from:
(a) Polythene
(b) Polystyrene
(c) Perspex
(d) Teflon
▶ (b) Polystyrene

13. Which of the following softens on heating and then can be moulded into various shapes?
(a) thermosetting plastic
(b) thermoplastic
(c) polythene
(d) none of these
▶ (b) thermoplastic

14. Contacts lenses are made from:
(a) Polyvinyl chloride
(b) Polystyrene
(c) Lucite
(d) Teflon
▶ (c) Lucite

15. Which of the following once set do not soften on heating?
(a) thermoplastic
(b) thermosetting plastic
(c) polvthene
(d) none of these
▶ (b) thermosetting plastic

16. Which of the following is similar to cotton ?
(a) Nylon
(b) Dacron
(c) Rayon
(d) Terylene
▶ (c) Rayon

17. Bristles of tooth brush are made from:
(a) thermoplastic
(b) therniosetting plastic
(c) nylon
(d) PET
▶ (c) nylon

18. Which of the following does not produce insoluble carbonates in hard water?
(a) Soap
(b) Detergents
(c) Both the above
(d) None of these
▶ (b) Detergents

19. Food hems are stored in plastic containers because they are:
(a) corrosive
(b) non-corrosive
(c) easy to handle
(d) all of these
▶ (b) non-corrosive

20. If tartaric acid is not added in baking powder, the cake will taste bitter due to the presence of:
(a) Sodium hydrogen carbonate
(b) Carbon dioxide
(c) Sodium carbonate
(d) All of these
▶ (c) Sodium carbonate

21. Which of the following is a thermosetting plastic?
(a) PVC
(b) nylon
(c) teflon
(d) bakelite
▶ (d) bakelite

22. Soda-acid fire extinguisher extinguishes the fire:
(a) By cutting the supply of air
(b) by removing the combustible substance
(c) By raising the ignition temperature
(d) None of these
▶ (a) By cutting the supply of air

23. Which of these fibres is made from raw material obtained from plants?
(a) rayon
(b) nylon
(c) terylene
(d) polyester
▶ (a) rayon

24. The material similar to silk in appearance is:
(a) Nylon
(b) Rayon
(c) Polyester
(d) Terylene
▶ (b) Rayon

25. Polymer present in plants is:
(a) cellulose
(b) nylon
(c) rubber
(d) PVC
▶ (a) cellulose

26. Which of the following is not a common property of Plastic?
(a) Non-reactive
(b) Light in weight
(c) Durable
(d) Good conductor of electricity
▶ (d) Good conductor of electricity

27. Polymer present in wood is:
(a) nylon
(b) cellulose
(c) polythene
(d) rubber
▶ (b) cellulose

28. Raw materials for preparation of synthetic fibres are obtained from
(a) coal
(b) petroleum
(c) natural gas
(d) all of these
▶ (d) all of these

29. Polythene and PVC are examples of
(a) Bio degradable substance
(b) Thermosetting plastics
(c) Thermoplastics
(d) Rayon
▶ (c) Thermoplastics

30. The 4 R Principle is
(a) Reduce, Reuse, Recycle, Recover
(b) Remember, reduce, Recycle, Rejoice
(c) Repeat, Rejoice, recycle, reduce
(d) None of these
▶ (a) Reduce, Reuse, Recycle, Recover

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