MEDIUM
8th CBSE
IMPORTANT
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What are thermoplastics? Give two examples of thermoplastics.

Important Questions on Synthetic Fibres and Plastics

MEDIUM
8th CBSE
IMPORTANT
Lakhmir Singh's SCIENCE FOR CLASS 8>Chapter 3 - Synthetic Fibres and Plastics>Long Answer Type Questions>Q 53
What are thermosetting plastics? Give two examples of thermosetting plastics.
HARD
8th CBSE
IMPORTANT
Lakhmir Singh's SCIENCE FOR CLASS 8>Chapter 3 - Synthetic Fibres and Plastics>Long Answer Type Questions>Q 54
Explain why thermoplastics become soft on heating but thermosetting plastics do not become soft on heating. Draw labelled diagrams to illustrate your answer.
HARD
8th CBSE
IMPORTANT
Lakhmir Singh's SCIENCE FOR CLASS 8>Chapter 3 - Synthetic Fibres and Plastics>Long Answer Type Questions>Q 55
What is meant by biodegradable and non-biodegradable materials? Give examples of two biodegradable and two non-biodegradable materials.
EASY
8th CBSE
IMPORTANT
Lakhmir Singh's SCIENCE FOR CLASS 8>Chapter 3 - Synthetic Fibres and Plastics>Multiple Choice Questions (MCQs)>Q 56
Rayon is different from truly synthetic fibres because : 
EASY
8th CBSE
IMPORTANT
Lakhmir Singh's SCIENCE FOR CLASS 8>Chapter 3 - Synthetic Fibres and Plastics>Multiple Choice Questions (MCQs)>Q 57
The synthetic material which can be used for making fabrics as well as shatterproof bottles and jars is: 
MEDIUM
8th CBSE
IMPORTANT
Lakhmir Singh's SCIENCE FOR CLASS 8>Chapter 3 - Synthetic Fibres and Plastics>Multiple Choice Questions (MCQs)>Q 58
Which of the following has cross-linked polymer chains?
EASY
8th CBSE
IMPORTANT
Lakhmir Singh's SCIENCE FOR CLASS 8>Chapter 3 - Synthetic Fibres and Plastics>Multiple Choice Questions (MCQs)>Q 59
The man-made fibre made from the cellulose polymer is:
EASY
8th CBSE
IMPORTANT
Lakhmir Singh's SCIENCE FOR CLASS 8>Chapter 3 - Synthetic Fibres and Plastics>Multiple Choice Questions (MCQs)>Q 60
Which of the following is not a thermoplastic polymer?