Advertisements
Advertisements
प्रश्न
Hair trap a lot of ______, which is a poor ______ of heat.
Advertisements
उत्तर
Hair trap a lot of air, which is a poor conductor of heat.
APPEARS IN
संबंधित प्रश्न
Very Short Answer Type Questions:
Name two natural fibres.
Classify the following fibre as natural or synthetic:
wool
Classify the following fibre as natural or synthetic:
polyester
Animals fibres are ______ and ______.
A natural fibre is called ______.
Which of these is a synthetic fiber?
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)
Write various steps for processing fibres into wool.
Complete the given analogy.
Coir fibre : ______ :: Cotton fibre : Cotton Plant
