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प्रश्न
‘Manufacturing synthetic fibres is actually helping conservation of forests’. Comment.
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उत्तर
Raw materials for natural fibres are mainly derived from plants and this means cutting a lot of trees. This leads to deforestation. But raw materials of synthetic materials are mainly petrochemicals. Hence, manufacturing synthetic fibres helps in the conservation of forests.
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संबंधित प्रश्न
Fill in the blanks with appropriate words.
Synthetic fibres are also called ______ or _______ fibres.
Give examples which indicate that nylon fibres are very strong.
Match the terms of column A correctly with the phrases given in column B.
| A | B | ||
| 1 | Polyester | a | Prepared by using wood pulp |
| 2 | Teflon | b | Used for making parachutes and stockings |
| 3 | Rayon | c | Used to make non-stick cookware |
| 4 | Nylon | d | Fabrics do not wrinkle easily |
True or False
It is good to wear clothes made of synthetic fibres while cooking.
Crossword
Across
1. Fibre that is used as synthetic wool.
2. A plastic used for making water bottles.
3. A long chain made of small repeatingmonomers.
4. Another name for this semi-synthetic fibre is artificial silk.
Down
5. A type of fibre that is naturally obtained from a cocoon.
6. A synthetic fibre classified as polyester.
7. A polymer used for making rope.
What do you mean by synthetic fiber?
The material similar to silk in appearance is ______.
A synthetic fiber which looks like silk is obtained by chemical treatment of wood pulp. It is, therefore, known as artificial silk. What is its common name?
The first fully synthetic fibre was ______.
Write an activity to show that synthetic fibres are stronger than the cotton fibres.
