Synthetic fiber and plastic class 8 NCERT solution.
Synthetic fiber and plastic solution. 1. Explain why some fibres are called synthetic. Answer: Some fibres are called synthetic fibres because they are made by man using chemicals. 2. Rayon is different from synthetic fibres because it is obtained from wood pulp. 3. Fill in the blanks with appropriate words. (a) Synthetic fibres are also called ____ or ____ fibres. (b) Synthetic fibres are synthesised from a raw material called _____ (c) Like synthetic fibres, plastic is also a _____ Answer: (a) man-made, artificial fibres (b) petrochemicals (c) polymer 4. Give examples which indicate that nylon fibres are very strong. Answer: The following examples indicate that nylon fibres are very strong. (i) They are used for making parachutes and ropes for rock climbing. (ii) They are used in making seat-belts, fishing nets, tyre cord, a string for sports rackets and...