[NCERT Exemplar] One thread burnt with a smell of burning hair and the other burnt with the smell of burning paper. True. i. This process of washing of sheared hair is called scouring. (d) production of sarees . From what type of health problems the workers suffered while working in a wool industry? NCERT Solutions for Class 6, 7, 8, 9, 10, 11 and 12. Question 3. The cocoon are kept under the sun, boiled water or exposed to steam. The hair of sheep grow again before the onset of winter and protect them in cold weather. Wool fibre cannot be obtained from which of the following? (b) Silk scarf Answer: Answer: Answer: (a) Eggs of silk moth … How do the hair of certain animals help in keeping their bodies warm? B) done clear. Silkworms spin …… of silk fibre. is a long continuous thread. Wool and silk are animal fibres. Fur and leather are animal products which are obtained from the skin of animals by killing them. Egg ➝ Larva (or caterpillar) ➝ Pupa ➝ Silk moth which actually makes the silk fibre? (cotton and jute are plant fibres). Solution: The fruits or bolls of cotton plants are used to obtain cotton fibre and jute is obtained from the stems of the jute plants. Answer: Answer: The different processes involved in wool production are shearing, scouring, grading, dyeing, and drying. Finally, we conclude that the sheep’s hair is sheared off from the body, scoured, sorted, dyed, combed and spun to obtain wool (for knitting sweaters) and woollen yarn (for weaving cloth). In his line of work, he does the job of sorting the fleece of sheep into fibres of different qualities. (d) Moth silk Artificial silk is a plant fibre. Question 13. Question 21. So, on burning cotton and paper both give similar smell. (d) selecting fine hair for good quality wool Question 6. Angora is the soft white hair of Angora Rabbit. Radhika wanted to buy a silk frock and went to the market with her mother. Mulberry silk is soft, lustrous (shiny) and elastic and can be dyed in different colours. (c) Cocoon The finest wool is obtained from Merino sheep. poor, Question 15. (b) cotton ball Answer. Reeling is done in special machines. Silk is a natural carbohydrate fibre. China, Question 14. (a) Neha’s mother took a thread of natural silk fabric and another thread of artificial silk fabric and burn them separately. B) Refining done clear. acids and bases, Question 10. Silk fibre belongs to which class of organic substance? Wool industry is an important source of livelihood for many people in our country. Answer: in which part of India, yak wool is common? The process of taking out threads from the cocoons for use as silk is called reeling the silk. Do you know why? Question 7. Question 5. Answer: From Cocoon to Silk Give reason for your answer. Mohair Shawls. You can specify conditions of storing and accessing cookies in your browser. The most common variety of silk is mulberry silk. Silk fibres come from cocoons of the silk moth. 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