Class 8 Science Chapter 3 Test Paper Set-1 Pdf Download CBSE

Test Paper Of Class 8 Science Chapter 3 Chemistry Synthetic Fibres and Plastic

Class 8 Science Chapter 3 Test Paper Set-1 Pdf

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Chapter 3 Test Paper (01)

Class 8 Science Chapter 3 Synthetic Fibres and Plastic Test Paper Set-1 Text Form:-

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Class 8 Science (Worksheet)

Chapter-3 (Synthetic Fibres and Plastic)

A. Tick the Correct Options: (MCQ Question)

1. The fibre developed in New York & London simultaneously is:

  • Nylon
  • Rayon
  • Teflon
  • Silk

2. Handles of most pans are made up of:

  • thermoplastic
  • thermosetting plastic
  • acrylic
  • hemp

3. Which of the following is biodegradable substance?

  • Cotton Cloth
  • Thermosetting plastics
  • Thermoplastics
  • PVC Pipes

4. is stronger than steel wire.

  • Cotton fibre
  • Silk thread
  • Plastic thread
  • Nylon fibre

5. which of the following will be suitable for coating dress material of fire – men

Answers
  • Nylon
  • polyster
  • melamine
  • acrylic

B. Fill in the Blanks

  1. Plastics are __________ conductors of heat and electricity.
  2. Rayon, Nylon are some examples of __________ fibres.
  3. The materials or wastes which cannot be broken by the bacteria and cause harm to the environment are called __________ materials.
  4. __________ is used to make pants, shirts, suits etc.
  5. __________ is a material that can be moulded into different shapes on heating.

C. Subjective Questions (Short Answers type Questions)

  1. What are natural fibres? Explain with example.
  2. Is it advisable to use recycled plastic containers for storing food?
  3. What are the thermosetting polymers?
  4. What thermoplastic and thermosetting polymers ?
  5. Why accumulation of plastic is considered a serious problem ?
  6. Mark the correct answer.
  7. Rayon is different from synthetic fibres because:
    • It has a silk like appearance.
    • It is obtained from wood pulp.
    • Its fibres can also be woven like those of natural fibres.
  8. Write a short note on biopolymers and biodegradable polymers
  9. What is nylon used for?
  10. What are plastics? Write the names of polymers of main plastics.
  11. What does the term non-biodegradable mean?
  12. “Use of plastic becomes the reason for deforestation but at the same time, it is also become the reason to bring down deforestation”
  13. Substantiate this statement.
  14. Can pickles be stored in plastic containers? Give reason for your answer.

D. Long Answer Types Question:-

  1. Distinguish between Thermoplastics and thermosetting plastics.
  2. Give the two differences between thermoplastics and thermosetting plastic.
  3. What are bended fiber? Give any two examples.
  4. What are natural fibres? Explain with examples.
  5. Why it is not advise to burn plastic and synthetic fibres ?

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