Question 5. (a) polyester FALSE; Epoxy resin is a thermoplastic? True B. ………………… fabrics do not wrinkle easily. Wood pulp is used for preparation of: Plastics are non-biodegradable. The plastics which when moulded once, can not be softened by heating are called …………………, Question 10. Give examples which indicate that nylon fibres are very strong. (a) polythene and cotton Question 1. Question 2. (a) nylon Synthetic fibres are strong, durable and shining, Question 3. In lab I made samples that were mounted in bakelite. Question 18. 21. (c) teflon Rubber and wood are good conductors of electricity. Polywool is a mixture of: (d) none of these. True or False: Celluloid was used for billiard balls, men's fashion collars, and movie film. Which of the following statements is false? The Mechanical Properties Of Most Semi-crystalline Polymers Are Highly Dependent On Both Temperature And Strain Rate. (v) complex chemical molecules made of many type of single units. HIPS ? Plastic is environmental friendly. Question 2. Hope the information shared regarding the NCERT MCQ Questions for Class 8 Science Chapter 3 Synthetic Fibres and Plastics with Answers Pdf free download is true and genuine as far as our knowledge is concerned. (c) plastic covering on electric wires (b) polyester and cotton Articles made of thermosetting plastics Articles made of … Question 4. Teflon is used to make non-stick cookwares. Question 7. Synthetic fibres are: Question 20. (a) rayon Which of the following softens on heating and then can be moulded into various shapes: False 10. Question 16. (a) glucose (b) thermoplastic (d) polyester and wool. Polywool is a mixture of polyester and wool. State whether the statements given below are True or False. Melamine (MF) ? Bakelite is an example of polymer. Acrylic, polyethylene and polystyrene are thermoplastic. See the answer. (c) glass Question 13. Question 6. True 5. (c) protein ………………… has anti-stick property and used as a coating on the surface of frying pan. Bakelite is a thermosetting plastic and is used for making electrical switches, handles of various utensils, etc. The terms thermoplastic and thermoset stand for how a material is or can be processed under a changed temperature [1]. Thermosetting plastic once set do not soften on heating. (c) nylon Wire made from which fibre is strongest: Bakelite is a thermosetting plastic. Question  14. (True Or False) This problem has been solved! Polycot is a mixture of polyester and cotton. (b) non-corrosive Soln: On heating, Thermoplastics get deformed and they can be easily bent. (a) rayon Nylon fibre is used for making nylon parachutes and ropes for rock climbing. When did organ music become associated with baseball? How long will the footprints on the moon last? Polymer present in wood is: The 4-R principle is (a) ……………… (b) ……………. False 6. False 8. Wood is a natural substance where as plastics, cement and glass are man-made substances. (c) rayon (d) wood. The material on this site can not be reproduced, distributed, transmitted, cached or otherwise used, except with prior written permission of Multiply. Contact us for your Swiss made TCU! (i) chemical molecules formed naturally like silk, cotton etc. (a) polythene and cotton Can you write the major difference between these two types of plastics? Question 10. (b) plastic bowls Which of the following is not biodegradable: (d) all of these, (d) all of these (d) melamine. (iii) the process of formation of polymers by synthesis of monomers. (c) polyester (b) polyester Polyester fibres are used for making hand knit sweaters. Cotton fibre burns readily with smell of burning paper. Type of single unit chemical called ………………… thermosetting plastic and is used for making nylon parachutes and ropes for climbing. 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