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प्रश्न
Hair trap a lot of ______, which is a poor ______ of heat.
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उत्तर
Hair trap a lot of air, which is a poor conductor of heat.
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संबंधित प्रश्न
Very Short Answer Type Questions:
Name two natural fibres.
When you place a natural fibre in a flame it ______.
A natural fibre is called ______.
Dacron is an example of artificial fibers.
Terrycot is made by mixing two types of fibres. Write the names of the fibres.
A lady went to the market to buy a blanket. The shopkeeper showed her blankets made of acrylic fibres as well as made of wool. She preferred to buy an acrylic blanket. Can you guess why?
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)
Write various steps for processing fibres into wool.
Which set of substances is not used for making fibres?
Complete the given analogy.
Coir fibre : ________ :: Cotton fibre : Cotton Plant
