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Explain why some fabrics are called synt...

Explain why some fabrics are called synthetics.

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Some fabrics do not occur in nature and are obtained from chemicals, hence are called synthetic fibres.
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Explain why some fibres are called synthetic.

Explain why some microorganisms are called biofertilizers. Give two examples.

(a) Describe an activity to show that while paper is biodegradable but plastic (say, polythene) is non-biodegradable. (b) Explain why, some materials are biodegradable but some are non-biodegradable.

PEARSON IIT JEE FOUNDATION-SYNTHETIC FIBRES AND PLASTICS -COMPETITION CORNER (Choose the correct option)
  1. Explain why some fabrics are called synthetics.

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  2. Why should plastic materials always be recycled?

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  3. Which of these items are made using teflon due to its high tensile str...

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  4. Which of these synthetic fabric types consist of Dacron and Terylene?

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  5. Which of these objects is made of thermosetting plastic?

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  6. What does PVC stand for?

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  7. Which of these was the first fully-synthetic fibre to be manufactured?

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  8. Why does one need to be extra cautious while ironing synthetic fibres?

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  9. Why are synthetic fibres not suitable for the summer season?

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  10. Which of these is a disadvantage of synthetic fibres?

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  11. Which of these is an advantage of synthetic fibres?

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  12. Why should polyester clothes be avoided in chemical laboratories?

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  13. Which of these monomers are combined to form polythene?

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  14. Why is acrylic often used as a replacement for wool?

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  15. Which of these synthetic fibres is also known as artificial silk?

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  16. Which of these diseases can be caused by using synthetic fabrics?

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  17. Which of these shrinks away from flame and burns with spluttering?

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  18. Which of these fibres smells like burning hair on heating?

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  19. Which of these is an example of a blended fibre?

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  20. Which part of a coconut is used to obtain coir?

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  21. Which of these fibres is made from cellulose?

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