About Synthetic fibres and Plastics

Fabrics are used to make the clothing we wear on a daily basis. Natural and man-made fibers are used to make fabrics, which are then sewn together to create garments. Natural fibers include wool, silk, and cotton, whereas synthetic fibers include polyesters and terylene.

The fibre fever!

Fibre

  • The materials from which our garments are created are called fabrics.
  • Natural or synthetic fibers are used to make fabrics.
  • A wide range of household items may also be made from fibers.

Polymer

"Polymer" is a combination of two Greek words: poly, meaning many, and mer, meaning component or unit. It is a polymer, a material made up of a large number of identical subunits.

Synthetic Fibre

  • Synthetic or man-made fibers are fibers that are produced or created by humans.
  • There are a number of synthetic fibers that have been developed by humans. For example, rayon and nylon.

Natural Fibre

The term "natural fibers" refers to man-made fibers derived from living organisms, such as plants or animals. Cotton, wool, silk, and other fibers are examples

Rayon

  • Chemically, pure cellulose is chemically transformed into a soluble component to make rayon.
  • Rayon is a man-made fiber, yet it is derived from natural sources like wood pulp. This is due to the fact that rayon may be chemically treated.
  • Rayon is cheaper than silk, yet it may be woven like silk fibers.

The classic plastics!

Plastic

  • Plastic, like synthetic fiber, is a polymer.
  • All polymers are not arranged in the same way. Some are cross-linked, while others are linear.
  • Plastic may be recycled, reused, colored, melted, rolled into sheets, or turned into wires; it can even be woven into fibers. That's why it's so useful in so many situations.

Thermoplastics

Thermoplastics are polymers that distort easily when heated and may be bent easily. Consider polythene and PVC.

Thermosetting Plastics

Heat cannot soften plastics that have been molded once. Bakelite and melamine are examples.

Characteristics of Plastics

  • Plastic is a non-reactive substance.
  • Plastic is lightweight, sturdy, and long-lasting.
  • Plastic is a bad conductor of electricity.

Environmental Effects on Plastic

  • Plastic takes a long time to degrade, making it unfriendly to the environment.
  • It pollutes the environment.
  • As a result, it takes a long time for the synthetic material to be entirely combusted.
  • As a result, it contributes to air pollution by releasing toxic gases into the environment.

Following are some of the multiple choice questions on the Synthetic fibres and Plastics with answers that will help the students in developing their knowledge.

Synthetic fibres and Plastics MCQ

1. Plastics which get deformed easily on heating and can be bent easily are known as thermoplastics

  • Ture
  • False

2. Teflon is a special plastic on which oil and water do net stick.

  • Ture
  • False

3. The materials which is not easily decomposed by natural processes is called biodegradable.

  • False
  • true

4. Characteristics of synthetic fibres :

  • They are Strong, durable
  • Absorb very less water
  • Wrinkle resistant, light weight
  • All of above

5. The properties of plastic

  • Poor conductors of electricity
  • Cheap
  • Strong, durable
  • All of above

6. Which of these is a fibre derived from chemicals?

  • Cotton
  • Nylon
  • Rayon
  • Silk

7. State if true or false. Plastics are poor conductors of heat

  • True
  • False

8. List the 5Rs.

  • Reduce, Reuse, Recycle, Recover, Refuse
  • None
  • There are only 3 options. Reduce, Reuse and Recycle
  • None of these

9. There are two properties of rayon below. Select the two correct properties.

  • It is a versatile fibre.
  • IIt can be dyed in different colours.
  • It do not emit any toxic substances.
  • Both A & B

10. Name the form of polyester which is replacing materials like glass and used for making bottles and jars.

  • Polymer
  • Plastic
  • PET
  • PVC

11. What is the full form of PVC?

  • Polyvinyl Chloride
  • Permanent Virtual Circuit
  • Both A & B
  • None of these

12. What is Ester?

  • A fibre
  • A sweet-smelling compound.
  • Polymer + polyester
  • None of the above

13. Name a basic component of animal fibres.

  • Protein
  • cellulose
  • fats
  • animal calls

14. Synthetic fibres are synthesised from a raw material called ________.

  • PET
  • PVC
  • petrochemicals
  • thermosetting plastics

15. The uniforms of firemen have coating of __________ plastic to make them flame resistant.

  • terylene
  • bakelite
  • PET
  • melamine

16. A polymer is a chain of many small units joined together which is called

  • synthetic fibres
  • monomers
  • PVC
  • None of these

17. Artificial wool is called

  • acrylic
  • Rayon
  • Polycot
  • None of these

18. Which fibre is used to make parachutes?

  • nylon
  • Rayon
  • Teflon
  • Jute

19. Terylene + cotton =

  • terrysilk
  • terrywool
  • terycot
  • none

20. Which synthetic fibre is called as an artificial silk?

  • Nylon
  • Rayon
  • Terylene
  • Polymer

21. Cotton is a natural polymer. What is it's chemical name?

  • cellulose
  • Sodium hypochlorite
  • Potassium chromium sulfate
  • Calcium hypochlorite

22. PET is a type of

  • Nylon
  • Rayon
  • Acrylic
  • Polyster

23. ...... is not a natural fiber.

  • cotton
  • silk
  • wool
  • nylon

24. .... ... fiber is as strong as steel

  • Nylon
  • Rayon
  • Acrylic
  • Terylene

25. A chain of small chemical units combined to form a large single unit is called ____

  • Polymer
  • Poly

26. Polythene and PVC are examples of

  • Bio degradable substance
  • Thermoplastics

27. Paheli Is Taking Preparation For Her Final Examination. She Is Writing Some Statements About “Nylon” But She Confused To Know Whether The Statements Are Correct Or Not? Would You Help Her?

  • Nylon is the first fully synthetic fibre.
  • Nylon is made up of the repeating units of amide chemical.
  • Nylon is a thermosetting polymer.
  • Nylon fibres absorb very little water.

28. _________ is the first fully synthetic fibre.

  • Acrylic
  • Polyester
  • Nylon
  • Rayon

29. The small unit of polymer is called....

  • Nylon
  • Terylene
  • Monomer
  • Naphthalene

30. Rayon is the different from synthetic fiber because

  • it has a silk like appearance
  • it is obtained from wood pulp
  • its fibers can also be woven like those of natural fibers
  • All the above

31. The first rayon factory in India is in......

  • Andhra Pradesh
  • Kerala
  • Karnataka
  • Maharastra

32. Monomer of Rayon and Nylon respectively.

  • Rayon - Amide , Nylon - cellulose
  • Rayon - strongest , Nylon - Acrylonitrile
  • Rayon- cellulose , Nylon- Amide
  • none of the above

33. What is Nylon Made of?

  • Coal, Air and Plastic
  • Paper, Rope and Air
  • Plastic, Metal and Coal
  • Coal, Air and Water

34. Acrylic fibres are used for making ___

  • sweaters
  • shawls
  • blankets
  • all of these

35. Rayon mixed with cotton to make ... ...

  • bed sheets
  • carpets
  • diapers
  • door mats

36. The strongest synthetic fibre is

  • nylon
  • rayon
  • polyester
  • acrylic

37. Polymers are made up of small units called

  • layers
  • molecules
  • cells
  • monomers

38. Which fibre is used as artificial wool?

  • Rayon
  • Acrylic
  • Nylon
  • Cotton

39. What is the other name for artificial silk

  • rayon
  • nylon
  • acrylic
  • polyester

40. Plastics are eco-friendly

  • True
  • False

41. Synthetic fibres do not shrink

  • True
  • False

42. True or falsePlastics do not effect environment in any way

  • True
  • False

43. PVC stands for :

  • Polyvinyl chloride
  • Poly-Ethylene Terephalate
  • Premature Ventricular Contraction
  • All of above

44. Which of the following are synthetic fibres :

  • Nylon
  • Acrylic
  • Rayon
  • All of above

45. Nylon is used for :

  • Parachutes
  • Toothbrush bristles
  • Climbing ropes
  • All of above

46. What are the 2 types of plastics:

  • Thermoplastic and Thermosetting plastics
  • Thermosetting plastics and PVC
  • Thermoplastic and bakelite
  • None of the above

47. What plastic is used for handles of frying pans

  • Bakelite
  • Polyvinyl chloride
  • Melanie
  • Polythene

48. Which type of plastic is Bakelite

  • Thermosetting plastic
  • Thermoplastic
  • None of the above
  • None of these

49. Which type of plastic is used in making Insulation cover

  • Thermosetting plastic
  • Thermoplastic

50. What type of fibre is Rayon

  • Synthetic fibre
  • Natural fibre
  • It is not a fibre
  • None of the above

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