(b) thermoplastic Is Bakelite thermosetting or thermoplastic. (d) polythene. ? Telephone instruments can be recycled as it is made up of thermoplastics. Cellulose polymer is present in wood, Question 27. Question 5. Rubber and wood are good conductors of electricity. (d) polyester and wool As in, if you heat up the plastic after it sets, it burns instead of melts. (a) rayon Question 4. Most Polymers Used In 3D Printing Applications Are Thermoplastic. Question 14. Question 19. True 11. Question 6. Question 28. Which of the following is used to make non-stick cookwares: B. 3. ... Bakelite is obtained from phenol by reacting with [AIEEE 2008] A. HCHO. Question 6. Start studying True /False Industrial. (a) plastics (b) cement Acrylic, polyethylene and polystyrene are thermoplastic. Melamine (MF) ? (a) PVC (c) telephone instruments Which of the following fibre is natural polymer: How many candles are on a Hanukkah menorah? (b) jute PVC (polyvinyl chloride) is a thermoplastic and is used for making toys, chappals, etc. (a) broken plastics things Wire made from which fibre is strongest: (a) polythene and cotton A long chain like molecule consisting of a large number of simple small molecules joined to each other by chemical bonds is called polymer. TRUE ? Odd one out: choose the letter of the word that is not related from the other choices. Question 7. (b) fruit peels (c) polythene and wool Can you write the major difference between these two types of plastics? 13. FALSE; Epoxy resin is a thermoplastic? The plastics which when moulded once, can not be softened by heating are called …………………, Question 10. Question 24. True 5. Examples - Bakelite, Urea-formaldelyde resins • Addition Polymerisation or Chain Growth Polymerisation: Addition polymerisation is called chain growth polymerisation because it takes place through stages leading to increase in chain length and each stage produces reactive intermediates for use in next stage of the growth of chain. Which of the following is not biodegradable: Question 4. (b) Reuse It is good to wear clothes made of synthetic fibres while cooking. Question 17. (d) nylon. (b) nylon Multiple Choice Question. The first significant application of plastics began with the development of Bakelite™. (a) glucose PVC (polyvinyl chloride) is a thermoplastic and is used for making toys, chappals, etc. Hint: Write uses of synthetic polymers like nylon, acrylic, terylene, PET, plastics, etc. (a) steel 21. Hence, it is a thermosetting ploymer. (a) nylon (b) fructose (b) teflon Polymer, any of a class of natural or synthetic substances composed of very large molecules that are multiples of simpler chemical units. Aluminium foil is not biodegradable. Melamine is not thermoplastics, it is thermosetting plastic. ………………… fibre resembles wool. 2. False 6. (i) chemical molecules formed naturally like silk, cotton etc. Polymerization of thermoplastic resin can be accelerated through the use of pressure and heat. (c) hining (c) polyester (d) all of these. True. (c) acrylic Answer: True. Bristles of tooth brush are made from: ... State whether the following statements are True or False: Question 1. (a) nylon Thermoplastics and thermosetting polymers are types of plastic that undergo different production processes and yield a variety of properties depending on the constituent materials and production method. (c) easy to handle (a) polyester Question 13. (b) nylon ... bakelite Bakelite is a thermosetting plastic. Question 3. Acrylic fibres bums with a sooty flame and shrinks to form black beads. State whether the statements given below are True or False. (b) cotton (b) therniosetting plastic Teflon is used to make non-stick cookwares. (c) glass Which of the following fibre is synthetic: Question 10. Polymer present in plants is: (d) rotten fruits. Polyester is made up of the repeating units of a chemical called …………………. Question 17. Which of the following can be recycled: PET is a form of polyester. Thermosetting plastic once set do not soften on heating. Question 6. Electric plugs are made up ………………… plastics. (a) corrosive Polyester is a synthetic fibrous material. Hence, the correct answer is … (b) polyester and cotton (b) thermosetting plastic Rayon is: Soln: On heating, Thermoplastics get deformed and they can be easily bent. A synthetic fibre resembling wool is acrylic. Bristles of tooth brush are made from nylon because it is soft, flexible and strong. False 3. ………………… has anti-stick property and used as a coating on the surface of frying pan. Question 11. A material which gets decomposed through natural processes, such as action by bacteria, is called …………………. B (CH 2 OH) 2. Cotton fibre burns readily with smell of burning paper. (a) rayon Question 8. Question 5. False 14. Cellulose is made up of a large number of ………………… units. We should wear synthetic clothes while working in the kitchen or in a laboratory. (d) ball point pens. If plastics are burnt, they evolve oxygen gas. Who is the longest reigning WWE Champion of all time? Question 15. (d) iron wastes. (a) thermoplastic Polywool is a mixture of ………………… and wool. Learn vocabulary, terms, and more with flashcards, games, and other study tools. Wire made from nylon fibre is the strongest. ………………… fabrics do not wrinkle easily. (b) cellulose (d) wool. (b) nylon MCQ Questions for Class 8 Science with Answers, MCQ Questions for Class 11 Business Studies with Answers PDF Download Chapter Wise, MCQ Questions for Class 11 Accountancy with Answers PDF Download Chapter Wise, MCQ Questions for Class 11 Economics with Answers PDF Download Chapter Wise, MCQ Questions for Class 11 Biology with Answers PDF Download Chapter Wise, MCQ Questions for Class 11 Chemistry with Answers PDF Download Chapter Wise, MCQ Questions for Class 11 Physics with Answers PDF Download Chapter Wise, MCQ Questions for Class 11 Maths with Answers PDF Download Chapter Wise, MCQ Questions for Class 11 English with Answers Hornbill, Snapshots, MCQ Questions with Answers for Class 12, 11, 10, 9, 8, 7, 6, 5, 4, 3, 2, and 1 all Subjects, The Selfish Giant Extra Questions and Answers Class 8 English It So Happened, Children at Work Extra Questions and Answers Class 8 English It So Happened. Plastics are non-biodegradable. True 9. PET is form of: [CBSE AIPMT 2008] A. Articles made of thermosetting plastics Articles made of … Cotton clothes are more comfortable during hot/humid weather. Question 14. Fruit peels are biodegradable. C. CH 3 CHO. Which of the following is obtained from hair of an animal: Rayon is made from cellulose obtained from wood pulp (plants). (b) cotton Question 29. Which one of the following statements is not true? Cotton is natural polymer whereas rayon, polyester and polythene are synthetic polymers. (c) teflon (a) nylon Bakelite contains cross linked molecules which on heating undergo extensive cross linking in moulds and again become infusible. False 2. (c) rayon (c) polythene Thermoplastic and thermoset materials both fall under the broad category of Polymers. Food hems are stored ¡n plastic containers because they are: (b) teflon Question 14. (c) ……………….. (d) …………….. (a) Reduce Fabrics made of polyester do not wrinkle easily. Question 13. A material which is not easily decomposed by natural processes is termed as …………………. (b) glass HIPS ? (d) Recover, Question 9. MCQ Questions for Class 8 Science with Answers were prepared based on the latest exam pattern. (c) nylon Which of the following once set do not soften on heating: (d) steel. Most polymers used in 3D printing applications are thermoplastic. What are some samples of opening remarks for a Christmas party? Natural substance is: The 4-R principle is (a) ……………… (b) ……………. (a) nylon (iv) simple chemical molecules made of single unit. ? 14. (c) rayon Check the below NCERT MCQ Questions for Class 6 Science Chapter 12 Electricity and Circuits with Answers Pdf free download. A. Cellulose B. Starch C. Rubber D. DNA 15. True or false: "(Sittin' On) the Dock of the Bay" by Otis Redding was the 1st posthumous No.1 single in America? Thermoset vs thermoplastic, and Bakelite. The fibre that burns readily with smell of burning paper is: (a) acrylic (b) thermoplastic (b) plastic bowls The terms thermoplastic and thermoset stand for how a material is or can be processed under a changed temperature [1]. 4. A lot of plastic pollutes our environment. All Rights Reserved. (b) thermosetting plastic Question 3. True 18. Bakelite is a thermosetting plastic and is used for making electrical switches, handles of various utensils, etc. Question 1. (b) polyester and cotton Synthetic fibres are synthesised from raw material called …………………. Synthetic fibres are: do not wrinkle easily. Question 27. (True Or False) 2. Students are advised to practice the NCERT MCQ Questions for Class 8 Science Chapter 3 Synthetic Fibres and Plastics with Answers Pdf free download is available here. True or False. (a) aluminium foil We should wear ………………… clothes in the kitchen. ... False. The simplest molecule of a polymer is called …………………. Food items are stored in plastic containers because they are non-corrosive. (c) cotton Question 25. Differentiate between thermoplastic and thermosetting plastics. Synthetic fibres are moth and insect resistant. The starting monomers of bakelite are phenol and formaldehyde i.e.Bakelite is a thermosetting polymer. Question 7. (b)cotton Fill in the blanks. Nylon is synthetic whereas cotton, jute and silk are natural fibres. (c) polythene and wool Synthetic fibres are strong, durable and shining, Question 3. (a) polythene and cotton (d) wool When did organ music become associated with baseball? Question 26. (d) polyester and wool. (a) rayon (d) none of these. It cannot be reused. Question 4. TRUE ? (b) Recycle What precautions should you use when working in an area with a large number (d) P.V.C. Explain why some fibres are called synthetic. Question 12. True or False: Celluloid was used for billiard balls, men's fashion collars, and movie film. Fill in the blanks. Typically, saucepans are made with a heat-resistant plastic handle, because metal handles conduct heat, making it easier to get burned if the cook isn't careful. Acrylic, polyethylene and polystyrene are thermoplastic. Polycot is a mixture of: D. CH 3 COCH 3. Wood is a natural substance where as plastics, cement and glass are man-made substances. These MCQ Questions on Synthetic Fibres and Plastics Class 8 with answers pave for a quick revision of the Chapter thereby helping you to enhance subject knowledge. (d) bakelite Jammu & Kashmir has banned the use of plastic bags. (b) teflon If you feel any information regarding CBSE Class 8 Science Synthetic Fibres and Plastics MCQs Multiple Choice Questions with Answers is missing do reach us and we will look into it and add it accordingly. (c) nylon (a) polyester (b) fruit peels Plastics which gets deformed easily on heating and can be bent easily are known as …………………, Question 2. Sponsored by: Specialists in temperature control . Question 26. (b) nylon Preview this quiz on Quizizz. (c) rayon (d) wood. Which of the following cannot be recycled: 15. Synthetic fibres do not absorb …………………, Question 3. 11. Wool is a natural fibre obtained from plants. Question 2. (d) nylon. Which of the following is a thermosetting plastic: Is Bakelite thermosetting or thermoplastic? ………………… is used for making ploythene bags. Natural rubber has the trans-configuration at every double bond. 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. (b) non-corrosive Check the below NCERT MCQ Questions for Class 8 Science Chapter 3 Synthetic Fibres and Plastics with Answers Pdf free download. MCQ Questions for Class 8 Science with Answers were prepared based on the latest exam pattern. ... thermoplastic and thermosetting does bakelite belong? Which of the following statements is false? Rayon is made from cellulose obtained from wood pulp. (v) complex chemical molecules made of many type of single units. [CBSE AIPMT 2012] A. (a) thermoplastic MCQ Questions for Class 8 Science with Answers are prepared as per the Latest Exam Pattern. (a) artificial (c) polystyrene (a) cellulose (b) plastic chairs Bakelite is a thermosetting plastic. Question 8. (a) aluminium foil ? TRUE ? We know that bakelite is a thermosetting plastics, which is used for making electrical switches, handles of various utensils, etc. Fabrics made of …………………. (c) plastic covering on electric wires See the answer. (c) plastic covering on electric wires (ii) chemical molecules synthesized by human. (d) polyester and wool. I thought that thermosets were "set solid" by a chemical reaction that was irreversible. A bulb has two terminals. 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