1 make a list of different fibre changes observed when heating and types of fibre ?
2 prepare a table of various synthetic fibres which are used to make household articles ?
3 identify whether given plastic material is thermoplastic or thermosetting plastic by using flame test ?
4 give a stepwise procedure of making rayon
5 what is 4r principal ? describe ?
6 write the versatile properties of Nylon fibre ?
give correct answer if u don't know leave but answer atleast 3
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Answer:
Which of these is a natural fibre?
(a) rayon
(b) cotton
(c) nylon
(d) polyester
ANSWER:
(b) cotton
Natural fibres are greatly elongated hair-like substances obtained from plants or animals. They can be spun into filaments, threads or ropes. Cotton fibre is almost pure cellulose that grows in a protective capsule around the seeds of cotton plants.
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