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MBD-SYNTHETIC FIBERS AND PLASTICS-EXAMPLE
- 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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- Give one disadvantage of synthetic fibres.
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- What are non-biodegradabel susbtances?
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- Which material or thing is responsible for choking drains and death of...
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- What is 4R principle?
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- Plastics are non-biodergradable. Are they environment friendly or envi...
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- What are polymers? Give an example of natural polymer. Are polymers fo...
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- What are synthetic fibres?
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- Give few examples of synthetic fibres.
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- Give uses of Rayon and Nylon.
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- List the characteristics of synthetic fibres which make them popular d...
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- What happens when boron is heated in air ?
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- Why plastic material like polythene is preferred over natural material...
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