Why is rayon called a regenerated fibre?

Important Questions on Synthetic Fibres and Plastics

HARD

8th CBSE

IMPORTANT

Living Science 8>Chapter 3 - Synthetic Fibres and Plastics>EXERCISES>Q C

List two disadvantages of synthetic fibres.

MEDIUM

8th CBSE

IMPORTANT

Living Science 8>Chapter 3 - Synthetic Fibres and Plastics>EXERCISES>Q C

What is a plastic? All plastics have one common property−what is it?

MEDIUM

8th CBSE

IMPORTANT

Living Science 8>Chapter 3 - Synthetic Fibres and Plastics>EXERCISES>Q C

Why are plastic bottles commonly used to store chemicals in a chemistry laboratory?

MEDIUM

8th CBSE

IMPORTANT

Living Science 8>Chapter 3 - Synthetic Fibres and Plastics>EXERCISES>Q D

List the important properties of nylon that make it a useful synthetic fibre. Give two important uses of nylon.

HARD

8th CBSE

IMPORTANT

Living Science 8>Chapter 3 - Synthetic Fibres and Plastics>EXERCISES>Q D

Give three uses of polyester, and explain the reason for each use.

HARD

8th CBSE

IMPORTANT

Living Science 8>Chapter 3 - Synthetic Fibres and Plastics>EXERCISES>Q D

These days clothes made out of a mixture of synthetic fibres and natural fibres are more popular than those made purely out of synthetic fibres. Discuss the reasons for this.

HARD

8th CBSE

IMPORTANT

Living Science 8>Chapter 3 - Synthetic Fibres and Plastics>EXERCISES>Q D

Differentiate between thermoplastics and thermosetting plastics. Give two examples of each.

HARD

8th CBSE

IMPORTANT

Living Science 8>Chapter 3 - Synthetic Fibres and Plastics>EXERCISES>Q D

Plastics are very useful materials. Why then is there concern today about their increasing use?