What is rayon? How is rayon made?

Important Questions on Synthetic Fibres and Plastics

EASY

8th CBSE

IMPORTANT

Lakhmir Singh's SCIENCE FOR CLASS 8>Chapter 3 - Synthetic Fibres and Plastics>Long Answer Type Questions>Q 51

Give any two uses of rayon.

MEDIUM

8th CBSE

IMPORTANT

Lakhmir Singh's SCIENCE FOR CLASS 8>Chapter 3 - Synthetic Fibres and Plastics>Long Answer Type Questions>Q 52

What are synthetic fibres? Name any two synthetic fibres.

MEDIUM

8th CBSE

IMPORTANT

Lakhmir Singh's SCIENCE FOR CLASS 8>Chapter 3 - Synthetic Fibres and Plastics>Long Answer Type Questions>Q 52

Why have synthetic fibres become more popular than natural fibres?

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 thermoplastics? Give two examples of thermoplastics.

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 :