1. Clothes are made up of ______________ which are made from __________.
2. The polymer cellulose is made up of a large number of __________units.
3. Silk fibre is obtained from _____________ whereas artificial silk is obtained by chemical treatment of __________.
4. The polymer polyester is made up of repeating units of ______________.
5. Synthetic fabrics soak ________ water than the natural fabrics and take__ time to dry.(less/more)
6. Polythene which is used to make polythene bags is an example of a ________.
7. Iron rusts when it is exposed to ______________ and _____________.
8. Plastics do not react with ______________ and __________________.
9. Plastics are generally ___________________ than metals.
10. ________________ is a special plastic on which oil and water do not stick.
Q2. Answer the following:
1. Define a polymer.
2. Name a few synthetic fibres.
3. List the unique characteristics of synthetic fibres which make them popular dress materials.
4. Explain why plastic finds such a variety of uses.
5. Differentiate between thermoplastics and thermosetting plastics.
6. List the three characteristic properties of plastics.
7. What are the advantages of using a plastic container?
8. Why do electrical wires have plastic covering?
9. Why recycled plastic should not be used for storage of food?
10. Differentiate between a biodegradable and a non-biodegradable material
Synthetic Fibre And Plastics
VIII Synthetic fiber and Plastic Read and download
VIII Synthetic fiber and Plastic Read and download
VIII Synthetic fiber and Plastic view video
1. Define a polymer.
2. Name a few synthetic fibres.
3. List the unique characteristics of synthetic fibres which make them popular dress materials.
4. Explain why plastic finds such a variety of uses.
5. Differentiate between thermoplastics and thermosetting plastics.
6. List the three characteristic properties of plastics.
7. What are the advantages of using a plastic container?
8. Why do electrical wires have plastic covering?
9. Why recycled plastic should not be used for storage of food?
10. Differentiate between a biodegradable and a non-biodegradable material
Synthetic Fibre And Plastics
VIII Synthetic fiber and Plastic Read and download
VIII Synthetic fiber and Plastic Read and download
VIII Synthetic fiber and Plastic view video
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