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Should the handles and bristles of a too...

Should the handles and bristles of a toothbrush be made of the same material ? Explain your answer.

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PSEB-SYNTHETIC FIBRES AND PLASTICS-EXERCISE
  1. explain why iron sheets are coated with zinc layer?

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  2. Mark correct for the correct answer. Rayon is different from syntheti...

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  3. Fill in the blanks with appropriate words. Synthetic fibres are also...

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  4. Fill in the blanks with appropriate words. Synthetic fibres are synt...

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  5. Fill in the blanks Like synthetic fibres, plastic is also a………………

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  6. Give examples which indicate that nylon fibres are very strong .

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  7. Explain why plastic containers are favoured for storing food.

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  8. Write down differences between thermosetting polymers and thermoplasti...

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  9. Explain why the following are made of thermosetting plastics. Sauce...

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  10. Explain why the following are made of thermosetting plastics. Elect...

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  11. Categorise the materials of the following products into' can be recycl...

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  12. Rana wants to buy shirts for summer. Should he buy cotton shirts or sh...

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  13. Give examples to show that plastics are non -corrosive in nature.

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  14. Should the handles and bristles of a toothbrush be made of the same ma...

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  15. Avoid plastics as far as possibl',. Comment on this advice.

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  16. Manufacturing synthetic fibres is actually helping the conservation o...

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  17. Describe an activity to show that thermoplastic is a poor conductor of...

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