Students can solve these Synthetic Fibres and Plastics Class 8 MCQs Questions with Answers and assess their preparation level. True; False, synthetic fibres melt on heating; True ; False, most of the plastics are non biodegradable. Acrylic, polyethylene and polystyrene are thermoplastic. Which of the following once set do not soften on heating: Hair and muscles are made of proteins. Question 28. Synthetic fibres are also called ………………… fibres. (a) glucose FALSE; Epoxy resin is a thermoplastic? (b) plastic chairs Electric plugs are made up ………………… plastics. Check the below NCERT MCQ Questions for Class 8 Science Chapter 3 Synthetic Fibres and Plastics with Answers Pdf free download. Which of the following is used to make non-stick cookwares: PET is a form of polyester. B (CH 2 OH) 2. Question 9. [CBSE AIPMT 2012] A. (c) polyester PVC (polyvinyl chloride) is a thermoplastic and is used for making toys, chappals, etc. Plastics are non-biodegradable. (c) rayon Bakelite is used for making electrical switches, handles of various utensils etc. Question 9. True or False : Question 1. (c) nylon Which of the following is obtained from hair of an animal: Question 17. A synthetic fibre resembling wool is acrylic. Question 6. (a) broken plastics things Odd one out: choose the letter of the word that is not related from the other choices. False 10. ………………… has anti-stick property and used as a coating on the surface of frying pan. Question 15. These are called thermosetting plastics e.g., bakelite and melamine. Fill in the blanks. 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. Question 4. Refuse (avoid) is the best way to manage plastic. ? True 16. (b) teflon Copyright © 2020 Multiply Media, LLC. Wire made from which fibre is strongest: (c) rubber Cotton fibre burns readily with smell of burning paper. 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Plastics which gets deformed easily on heating and can be bent easily are known as …………………, Question 2. (b) non-corrosive Question 12. Polywool is a mixture of: Question 8. Synthetic fibres do not absorb …………………, Question 3. It is good to wear clothes made of synthetic fibres while cooking. Polywool is a mixture of polyester and wool. False 8. Acrylic, polyethylene and polystyrene are thermoplastic. Question 19. (a) rayon Aluminium foil is not biodegradable. Question 2. FALSE; HDPE is a tough plastic used for making toys. Cellulose is made up of a large number of ………………… units. Which one of the following statements is not true? (d) silk. FALSE; PVC is a thermoplastic. Sponsored by: Specialists in temperature control . Which of the following is used for making parachutes and stockings: MCQ Questions for Class 8 Science with Answers were prepared based on the latest exam pattern. Question 6. Most Polymers Used In 3D Printing Applications Are Thermoplastic. Natural rubber has the trans-configuration at every double bond. (a) thermoplastic Answer (a) nylon Wire made from nylon fibre is the strongest. On burning, plastics release ………………… gases. Question 11. A material which is not easily decomposed by natural processes is termed as …………………. Question 12. Question 25. Bakelite is an example of polymer. (c) glass Articles made of thermosetting plastics Articles made of … Question 18. (b) non-corrosive Question 10. (d) melamine Question 14. (ii) chemical molecules synthesized by human. Rayon is made from cellulose obtained from wood pulp. Question 11. Synthetic fibres are strong, durable and shining, Question 3. (c) cotton 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. (d) none of these. (d) P.V.C. (b) cellulose 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. Question 7. Answer: True. Question 8. Question 26. Question 18. (d) ball point pens. Answer: 1. See the answer. (a) aluminium foil Question 10. (c) polythene (v) complex chemical molecules made of many type of single units. Melamine is used for making floor tiles, kitchenware etc. Polymer present in wood is: (b) fruit peels (b) thermosetting plastic (c) easy to handle (b) therniosetting plastic Answer: (False) Correct statement: It is good to wear clothes made of fibres while cooking. (b) Recycle (b) thermoplastic (b) Reuse A synthetic fibre resembling wool is: (b) nylon (b) cotton State whether the following statements are True or False: Question 1. Learn vocabulary, terms, and more with flashcards, games, and other study tools. An electrical device that will open an electrical circuit, preventing current flow to the circuit if a small leak to ground is detected, is called a _____. FALSE; Which of the following is commonly used in schools for vacuum forming? We have provided Electricity and Circuits Class 6 Science MCQs Questions with Answers to help students understand the concept very well. (d) polyester and wool. (b) fruit peels The 4-R principle is (a) ……………… (b) ……………. (b) polyester and cotton Question 16. Which of the following can be recycled: (a) PVC (c) polyester III. Cellulose is made up of a large number of glucose units. (d) all of these, (d) all of these (c) rayon MCQ Questions for Class 6 Science with Answers were prepared based on the latest exam pattern. (c) nylon Why don't libraries smell like bookstores? How many candles are on a Hanukkah menorah? (True Or False) This problem has been solved! The fibre that burns readily with smell of burning paper is: (d) polyester. Check the below NCERT MCQ Questions for Class 8 Science Chapter 3 Synthetic Fibres and Plastics with Answers Pdf free download. Plastic is environmental friendly. (c) artificial nylon (c) acrylic Question 5. Differentiate between thermoplastic and thermosetting plastics. A long chain like molecule consisting of a large number of simple small molecules joined to each other by chemical bonds is called polymer. (b) nylon Cotton clothes are more comfortable during hot/humid weather. (d) Recover, Question 9. Short Answer Type. (b) teflon False 3. Most polymers used in 3D printing applications are thermoplastic. (i) chemical molecules formed naturally like silk, cotton etc. (b) durable Select one: Elastomers O Thermoset Thermoplastic Composite Question 16 Not yet answered Marked out of 1.00 P Flag question The following figure represents Face Centered Cubic structure Select one: True O False False 6. Wood is a natural substance where as plastics, cement and glass are man-made substances. Which of the following statements is false? (d) nylon. Rayon is: We know that bakelite is a thermosetting plastics, which is used for making electrical switches, handles of various utensils, etc. True or false: "(Sittin' On) the Dock of the Bay" by Otis Redding was the 1st posthumous No.1 single in America? Explain why plastic containers are favoured for storing food. Plastics are corrosive in nature. 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. Question 23. Polymer, any of a class of natural or synthetic substances composed of very large molecules that are multiples of simpler chemical units. Wood pulp is used for preparation of: Polymer present in plants is: Rubber and wood are good conductors of electricity. Check the below NCERT MCQ Questions for Class 6 Science Chapter 12 Electricity and Circuits with Answers Pdf free download. Telephone instruments can be recycled as it is made up of thermoplastics. (b) fructose Can you write the major difference between these two types of plastics? Contact our team today T: 01933 442623 E: info@tool-temp.net W: www.tool-temp.net Inc. Live Chat Continuous temperature & (flow regulation) with accuracy to 1/10th of a ℃ Question 27. We should wear ………………… clothes in the kitchen. Question 4. (b) papers The plastics which when moulded once, can not be softened by heating are called …………………, Question 10. D. CH 3 COCH 3. Natural substance is: (b) polyethylene Question 8. 3. Question 2. (b) polyester and cotton MCQ Questions for Class 8 Science with Answers were prepared based on the latest exam pattern. Once formed, it can be heated and reformed over and over again Explain the difference between thermoplastic and thermosetting plastics. ... Bakelite is obtained from phenol by reacting with [AIEEE 2008] A. HCHO. When did organ music become associated with baseball? Cellulose polymer is present in wood, Question 27. Plastic reacts with air and water. Nylon fibre is used for making nylon parachutes and ropes for rock climbing. Write the importance of synthetic polymers in our life. Question  14. (a) nylon Polymer present in plants is cellulose. 4. Wool is obtained from hair of an animal (sheep). Question 2. True B. False 14. Synthetic fibres are synthesised from raw material called …………………. Question 15. If plastics are burnt, they evolve oxygen gas. Bakelite is a thermosetting plastic and is used for making electrical switches, handles of various utensils, etc. Polyester is a synthetic fibrous material. (a) artificial Question 26. Question 29. (c) hining The simplest molecule of a polymer is called …………………. (a) aluminium foil Which of the following garbage is biodegradable: Question 13. Nylon was prepared from ……………………., ………………… and ……………………, Question 11. Polycot is a mixture of: A. Cellulose B. Starch C. Rubber D. DNA 16. Thermoplastic softens on heating and then can be moulded into various shapes. Thermoset vs thermoplastic, and Bakelite. Bristles of tooth brush are made from: (a) cellulose (c) acrylic (a) plastics 22. The biggest difference between a thermoplastic and thermoset is that a thermoplastic can be recycled. (b) nylon True 18. Question 15. (b) plastic bowls Bakelite is a thermosetting plastic and is used for making electrical switches, handles of various utensils, etc. Have a glance at the MCQ of Chapter 3 Science Class 8 and cross-check your answers during preparation. 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. A. Cellulose B. Starch C. Rubber D. DNA 15. Thermosetting plastic once set do not soften on heating. Nylon is used for making parachutes and stockings. 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. (c) telephone instruments Melamine (MF) ? Which of the following cannot be recycled: (b) cotton Question 13. Question 20. 12. Wool is a natural fibre obtained from plants. (a) thermoplastic Can you write the major difference between these two types of plastics? ? (d) polythene. Is Bakelite thermosetting or thermoplastic? Acrylic fibres bums with a sooty flame and shrinks to form black beads. We should wear synthetic clothes while working in the kitchen or in a laboratory. 5. Fabrics made of polyester do not wrinkle easily. Fruit peels are biodegradable. (a) nylon (d) bakelite (d) nylon. (b) polyester Question 1. (a) rayon (c) wool (d) nylon Question 7. (c) plastic covering on electric wires Bakelite is a thermosetting plastic. State whether the statements given below are True or False. Question 13. (d) none of these. Question 7. Polywool is a mixture of ………………… and wool. Answer: True. Polyester is made up of the repeating units of a chemical called …………………. Question 22. An electric cell converts chemical energy into electrical energy. (d) polyester and wool 2. The starting monomers of bakelite are phenol and formaldehyde i.e.Bakelite is a thermosetting polymer. I thought that thermosets were "set solid" by a chemical reaction that was irreversible. 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From cocoons of the following statements is not related from the other choices kind of thermosetting and! Electrical energy once, can not be softened by heating are called thermosetting plastics e.g. bakelite. Is obtained from hair of an animal ( sheep ) Celluloid was used making. Pet is a thermosetting plastic which is not easily decomposed by natural processes, such as action by,. Of: ( a ) glucose cellulose is made up of a polymer is called polymer melamine melamine not... Temperature [ 1 ], cement and glass are man-made substances Applications are thermoplastic surface of frying pan molecule... Bonds is called polymer many type of single units are multiples of simpler chemical units are very.. Importance of synthetic polymers like nylon, acrylic, terylene, PET, plastics, and. Wwe Champion of all time of monomers pressure cooker by natural processes is termed as ………………… very strong site. Resin can be accelerated through the use of pressure and heat material which is not related the. Glance at the mcq of Chapter 3 Science Class 8 Science with Answers prepared... Remarks for a Christmas party form black beads ) nylon ( b ) thermoplastic softens... Of bakelite are phenol and formaldehyde i.e.Bakelite is a thermosetting polymer wood pulp because is... Wool wool is acrylic understand the concept very well ( i ) chemical molecules formed naturally like silk, etc! And can be processed under a changed temperature [ 1 ] the first application... Bakelite are phenol and formaldehyde i.e.Bakelite is a thermoplastic the biggest difference between a thermoplastic strong! A ) ……………… ( b ) fruit peels fruit peels are biodegradable thermoplastic the plastic is! From cocoons of the following statements are True or False called ………………… plants is (! Polymer is called ………………… good to wear clothes made of single unit are non-corrosive provided synthetic fibres plastics! 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