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प्रश्न
When you place a natural fibre in a flame it ______.
पर्याय
melts
burns
gets nothing
explodes
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उत्तर
When you place a natural fibre in a flame it burns.
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संबंधित प्रश्न
Very Short Answer Type Questions:
How many types of fibres are there?
Very Short Answer Type Questions:
Name two synthetic fibres.
Classify the following fibre as natural or synthetic:
cotton
Classify the following fibre as natural or synthetic:
Jute
A natural fibre is called ______.
Match items in List A with the items of list B.
| List A | List B |
| (a) nylon | (i) non-stick coating |
| (b) PET | (ii) electric switches |
| (c) rayon | (iii) parachutes |
| (d) thermosetting plastics | (iv) polyester |
| (e) teflon | (v) artificial silk |
Complete the crossword given below with the help of clues.
Across
- Substance used as synthetic wool. (7)
- A plastic used for making containers and carry bags. (9)
- Substance made up of large number of smaller molecules. (7)
- Another name for this compound is artificial silk. (5)
Down
5. A type of fibre obtained naturally from cocoon. (4)
6. A synthetic fibre classified as polyester. (8)
7. A polymer used for making ropes. (5)
The rearing of silkworms for obtaining silk is called ______.
Which of these is a natural fiber?
Artificial fibres are stronger than natural fibres.
