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MBD-SYNTHETIC FIBERS AND PLASTICS-EXAMPLE
- Name some natural materials.
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- Write the name of one' natural polymer.
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- Name a fibre which is silk like but man made.
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- Which fibre is obtained from woodpulp?
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- In which year, Nylon was made?
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- Which fibre was made from coal, air and water?
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- Of which fibre, parachutes and tents are made of?
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- What is PET?
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- Why parachutes and ropes for climbing rocks are made of Nylon?
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- Give few characteristics of plastics .
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- What are Polythene and PVC?
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- Bakelite is an example of which type of plastic?
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- Where is Teflon used?
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- Which of these fibres is costly---wool, rayon?
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- Why does hot water deform plastic bottles?
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- Which thermosetting material is versatile, heat resistant and fireproo...
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- Why is plastic used in cars, aircrafts etc. instead of metals?
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- Why are plastic containers convenient to use?
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- Which synthetic fibre resembles wool?
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- Give two reasons for prefering synthetic fibres over natural fibres.
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