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Chapter - 3, Synthetic Fibres and Plastics, , Exercise Page No 41:, , Question 1:, , Explain why some fibres are called synthetic., , Answer:, , There are some fibres that are prepared by man by using chemicals., These are called synthetic fibres. These are made of small units that join, together to form long chains. Examples of synthetic fibres are rayon,, nylon, polyester, acrylic, etc., , Question 2:, , Mark (&Tick) the correct answer., , Rayon is different from synthetic fibres because, , (a) it has a silk-like appearance., , (b) it is obtained from wood pulp., , (c) its fibres can also be woven like those of natural fibres., , Answer:, Rayon is different from synthetic fibres because, (a) it has a silk-like appearance., , (b) it is obtained from wood pulp. (correct), , (c) its fibres can also be woven like those of natural fibres.