CBSE Worksheet for Chapter - 1 Synthetic Fibres And Plastics Class 8

Worksheets For class 8

Find CBSE Worksheet for chapter-1 Synthetic Fibres And Plastics class 8

1. CLASS-8
2. BOARD: CBSE
3. Chemistry Worksheet - 1
4. TOPIC: Synthetic Fibres And Plastics
5. For other CBSE Worksheet for class 8 Science check out main page of Physics Wallah.

SUMMARY 

• Monomers , polymers , polymerization.
• Fibres – types of fibres.
• Properties and uses of –
  1. Rayon
  2. Nylon
  3. Polyester
  4. Acrylic
  5. Spandex
  6. Koroseal
• Plastics - thermosetting and thermoplastics.
• Wastes – biodegradable and non-biodegradable.
• Problems and solutions associated with plastic disposal.

SECTION – 1

SECTION – 2

1. .Pick out the incorrect statement amongst the following :
   1. Nylon clothing can stand high temperature and are therefore good to wear in summers.
   2. The most important constituent of cotton is cellulose.
   3. Addition polymers are formed without the elimination of by- product molecules.
   4. Natural rubber is obtained as latex from rubber trees.
2. . Which of the following is used for nonstick coating on kitchen utensils ?
   1. PTFE
   2. PVC
   3. BUNA-S
   4. None of these
3. . Which of the following is a natural polymer ?
   1. Cellulose
   2. Nylon
   3. Polythene
   4. PVC
4. . Thermocol is made from –
   1. Polythene
   2. Polystyrene
   3. Perspex
   4. Teflon
5. . Which of the following is thermoplastic ?
   1. Polythene
   2. Bakelite
   3. Both (A) & (B)
   4. None of these
6. .Which of the following is similar to cotton ?
   1. Nylon
   2. Dacron
   3. Rayon
   4. Terylene
7. . Which of the following do not soften upon heating ?
   1. Lucite
   2. Bakelite
   3. Polystyrene
   4. Polythene
8. . The raw materials used in preparation of synthetic fibres is –
   1. Petrochemicals
   2. Petrol
   3. Gasoline
   4. Coaltar
9. . Why one should not wear polyester clothes while working in kitchen ?
   1. It catches fire & sticks on the body
   2. Clothes are costly
   3. Moisture absorbing capacity is less
   4. They are uncomfortable
10. . Uniforms of fireman have coating of melamine plastic, why ?
11. . Give two reasons why plastic containers are favored for storing food?
12. . What are the different steps involved in the process of fabric formation from petroleum products ?
13. . Give two clothing-related application of each of the following :
    1. Nylon
    2. polyester
    3. acrylic
14. . Discuss the limitations associated with synthetic fabrics ?
15. . Give reasons why –
    1. . Refrigerators and freezers have a plastic foam core.
    2. . Electrical wires have a plastic covering.
    3. . Cooking pans have plastic handles.
16. Write difference between thermoplastic and thermosetting plastic ?