Question 2. Rayon is: Bakelite is a thermosetting plastic and is used for making electrical switches, handles of various utensils, etc. 2. Hint: Write uses of synthetic polymers like nylon, acrylic, terylene, PET, plastics, etc. D. CH 3 COCH 3. (b) cotton (b) silk (d) melamine. Which of the following cannot be recycled: Which of the following once set do not soften on heating: (a) thermoplastic PET is a form of polyester. PVC (polyvinyl chloride) is a thermoplastic and is used for making toys, chappals, etc. Silk fibre is obtained from cocoons of the silk moth. (d) polyester and wool. PET is form of: (d) nylon. Start studying True /False Industrial. Question 13. Question 4. Which of the following statements is false? (b) plastic bowls Electric plugs are made up ………………… plastics. On burning, plastics release ………………… gases. (d) wood. Bristles of tooth brush are made from: (c) polystyrene do not wrinkle easily. Thermoplastic and thermoset materials both fall under the broad category of Polymers. (c) plastic covering on electric wires Wire made from nylon fibre is the strongest. Wool is a natural fibre obtained from plants. Question 20. 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. Food hems are stored ¡n plastic containers because they are: FALSE; Plastic is suitable for building large and heavy structures. (c) acrylic (a) rayon ? 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 ℃ Once formed, it can be heated and reformed over and over again (b) therniosetting plastic (c) artificial nylon (c) hining It cannot be reused. When did organ music become associated with baseball? (c) telephone instruments Building blocks of DNA A. (c) polythene Check the below NCERT MCQ Questions for Class 8 Science Chapter 3 Synthetic Fibres and Plastics with Answers Pdf free download. Cotton fibre burns readily with smell of burning paper. ………………… has anti-stick property and used as a coating on the surface of frying pan. Question 14. Polyester is a synthetic fibrous material. Explain the difference between thermoplastic and thermosetting plastics. (d) rayon. (a) artificial Have a glance at the MCQ of Chapter 3 Science Class 8 and cross-check your answers during preparation. (a) cotton (a) glucose (c) polyester (c) cotton We have provided Electricity and Circuits Class 6 Science MCQs Questions with Answers to help students understand the concept very well. Polymer present in plants is cellulose. (d) nylon. Question 23. (a) strong Learn vocabulary, terms, and more with flashcards, games, and other study tools. A lot of plastic pollutes our environment. (c) rubber (d) nylon (c) polythene and wool Fill in the blanks. Polyester is made up of the repeating units of a chemical called …………………. Question 11. Wire made from which fibre is strongest: (a) nylon (b) cotton (c) wool (d) steel. Question 3. Fruit peels are biodegradable. Question 6. Question 24. (d) wood (b) fruit peels Synthetic fibres are synthesised from raw material called …………………. Bakelite is a thermosetting plastic and is used for making electrical switches, handles of various utensils, etc. Jammu & Kashmir has banned the use of plastic bags. Polywool is a mixture of polyester and wool. Question 13. (a) cellulose Explain why some fibres are called synthetic. True. ? Question 6. Differentiate between thermoplastic and thermosetting plastics. A switch is made of an insulator. TRUE ? ... Thermoplastic polymer ... (Bakelite) _____ are tough, clear polymers used in protective helmets, safety glasses, and dental crowns. Which of the following fibre is natural polymer: (a) broken plastics things Polywool is a mixture of: Question 7. (i) chemical molecules formed naturally like silk, cotton etc. (c) glass (b) nylon True 11. What precautions should you use when working in an area with a large number PVC (polyvinyl chloride) is a thermoplastic and is used for making toys, chappals, etc. Synthetic fibres are: See the answer. C. CH 3 CHO. The 4-R principle is (a) ……………… (b) ……………. Question 17. False 2. Question 18. Wood is a natural substance where as plastics, cement and glass are man-made substances. Melamine (MF) ? Most polymers used in 3D printing applications are thermoplastic. What are some samples of opening remarks for a Christmas party? Question 15. (a) nylon (d) nylon Food items are stored in plastic containers because they are non-corrosive. Rubber and wood are good conductors of electricity. Question 1. The starting monomers of bakelite are phenol and formaldehyde i.e.Bakelite is a thermosetting polymer. A material which is not easily decomposed by natural processes is termed as …………………. Bakelite is a thermosetting plastic. (c) polvthene Which of the following is a thermosetting plastic: Plastic reacts with air and water. (a) carry bags (a) rayon MCQ Questions for Class 8 Science with Answers were prepared based on the latest exam pattern. Plastic covering on electric wire cannot by recycled as it is made up of theremosetting plastics. Bakelite and melamine are thermoplastics. 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 7. How many candles are on a Hanukkah menorah? Question 4. True 7. Cotton is natural polymer whereas rayon, polyester and polythene are synthetic polymers. Polycot is a mixture of polyester and cotton. Multiple Choice Question. (d) polyester. True 16. 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 known as thermoplastic. Question 5. (c) nylon Which of these fibres is made from raw material obtained from plants: 21. (a) nylon (d) rotten fruits. (b) teflon 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. Which of the following can be recycled: (b) teflon We should wear synthetic clothes while working in the kitchen or in a laboratory. MCQ Questions for Class 8 Science with Answers were prepared based on the latest exam pattern. 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. (a) nylon Wool is obtained from hair of an animal (sheep). Thermoplastics is used for making handles of pressure cooker. Thermoset vs thermoplastic, and Bakelite. (ii) chemical molecules synthesized by human. NCERT Class 12 Chemistry Exemplar for Chapter 15 Polymers provide you polymer questions multiple choice, polymer MCQ for NEET, Fill in the blanks, Match the following, True or False, Worksheets, polymers Class 12 important questions, exercises and assignments. MCQ Questions for Class 8 Science with Answers are prepared as per the Latest Exam Pattern. All Rights Reserved. (iv) simple chemical molecules made of single unit. (d) iron wastes. ………………… fabrics do not wrinkle easily. (c) wool (d) none of these. Cotton clothes are more comfortable during hot/humid weather. (c) nylon ? (d) cooker handles. 11. (d) polyester and wool. ... State whether the following statements are True or False: Question 1. Question 26. Fill in the blanks. State whether the following statements are True or False: Question 1. (d) PET. Question 2. Write the importance of synthetic polymers in our life. True or false: "(Sittin' On) the Dock of the Bay" by Otis Redding was the 1st posthumous No.1 single in America? TRUE ? (b) glass (d) ball point pens. Question 19. Polymer present in wood is: (a) aluminium foil (c) rayon Solving the Synthetic Fibres and Plastics Multiple Choice Questions of Class 8 Science Chapter 3 MCQ can be of extreme help as you will be aware of all the concepts. Synthetic fibres do not absorb …………………, Question 3. 3. True or False. Which of the following is used to make non-stick cookwares: (True Or False) 2. A material which gets decomposed through natural processes, such as action by bacteria, is called …………………. False 14. (b) teflon (d) steel. 4. The starting monomers of bakelite are phenol and formaldehyde i.e.Bakelite is a thermosetting polymer. Which of the following is not thermoplastics: Question 25. (a) aluminium foil Question 26. Wire made from which fibre is strongest: Can you write the major difference between these two types of plastics? Answer: True. (b) fructose Articles made of thermosetting plastics Articles made of … Plastics are non-biodegradable. Sponsored by: Specialists in temperature control . Which one of the following statements is not true? ? Melamine is not thermoplastics, it is thermosetting plastic. (b) polyester and cotton (a) acrylic PVC (polyvinyl chloride) is a thermoplastic and is used for making toys, chappals, etc. (b) non-corrosive A. Cellulose B. Starch C. Rubber D. DNA 15. In lab I made samples that were mounted in bakelite. Question 8. It is good to wear clothes made of synthetic fibres while cooking. (b)cotton (c) plastic covering on electric wires The fibre that burns readily with smell of burning paper is: ... bakelite Bakelite is a thermosetting plastic. (d) P.V.C. Question 4. Copyright © 2020 Multiply Media, LLC. It contributes sturdy structure to the plants. (d) polyester and wool (b) fruit peels Question 9. Question 16. (b) polyester and cotton True 5. (c) cotton 1. Answer the following questions in short: 1. (c) polyester Telephone instruments can be recycled as it is made up of thermoplastics. How long will the footprints on the moon last? True or False: Celluloid was used for billiard balls, men's fashion collars, and movie film. Question 29. (a) acrylic Question 15. Question 20. (d) rubber, (b) cellulose Question 12. Wood pulp is used for preparation of Rayon. We have provided Synthetic Fibres and Plastics Class 8 Science MCQs Questions with Answers to help students understand the concept very well. Synthetic fibres are moth and insect resistant. (c) polythene (c) polythene and wool TRUE ? Question 12. The material on this site can not be reproduced, distributed, transmitted, cached or otherwise used, except with prior written permission of Multiply. Melamine is used for making floor tiles, kitchenware etc. Answer (a) nylon Wire made from nylon fibre is the strongest. B. Give examples which indicate that nylon fibres are very strong. (b) Recycle (d) wool. The Mechanical Properties Of Most Semi-crystalline Polymers Are Highly Dependent On Both Temperature And Strain Rate. Polymerization of thermoplastic resin can be accelerated through the use of pressure and heat. (b) plastic chairs Cellulose is made up of a large number of glucose units. ………………… is used for making ploythene bags. I thought that thermosets were "set solid" by a chemical reaction that was irreversible. (b) teflon Question 18. (True Or False) This problem has been solved! Natural rubber has the trans-configuration at every double bond. Aluminium foil is not biodegradable. (b) Reuse (d) polythene. 15. True; False, synthetic fibres melt on heating; True ; False, most of the plastics are non biodegradable. (d) nylon. (d) bakelite Hence, the correct answer is … Question 16. A. III. The biggest difference between a thermoplastic and thermoset is that a thermoplastic can be recycled. Bakelite is a thermosetting plastic and is used for making electrical switches, handles of various utensils, etc. (b) non-corrosive (a) corrosive Question 7. (a) polyester b) Bakelite is a kind of thermosetting plastic which is a bad conductor of heat and electricity. Synthetic fibres are strong, durable and shining, Question 3. State whether the statements given below are True or False. A synthetic fibre resembling wool is: The terms thermoplastic and thermoset stand for how a material is or can be processed under a changed temperature [1]. (b) nylon (b) jute Polymer present in plants is: 5. Polycot is a mixture of: Preview this quiz on Quizizz. (c) rayon Acrylic, polyethylene and polystyrene are thermoplastic. (a) cellulose True or False: Receptacles used on the job site should be protected with a GFCI. (d) Recover, Question 9. (c) cement Nylon fibre is used for making nylon parachutes and ropes for rock climbing. FALSE; Epoxy resin is a thermoplastic? (a) nylon Acrylic fibres bums with a sooty flame and shrinks to form black beads. (d) nylon. Question 6. Question 9. Hair and muscles are made of proteins. True 9. Question 14. (v) complex chemical molecules made of many type of single units. Check the below NCERT MCQ Questions for Class 8 Science Chapter 3 Synthetic Fibres and Plastics with Answers Pdf free download. Refuse (avoid) is the best way to manage plastic. MCQ Questions for Class 6 Science with Answers were prepared based on the latest exam pattern. Current flows from positive terminal of cell to its negative terminal. Nylon is used for making parachutes and stockings. Soln: On heating, Thermoplastics get deformed and they can be easily bent. B (CH 2 OH) 2. ………………… fibre resembles wool. Who is the longest reigning WWE Champion of all time? Bakelite contains cross linked molecules which on heating undergo extensive cross linking in moulds and again become infusible. FALSE; HDPE is a tough plastic used for making toys. Question 27. Question 19. Which of the following is not biodegradable: 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. (a) thermosetting plastic ... thermoplastic and thermosetting does bakelite belong? Polywool is a mixture of ………………… and wool. 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Answer: (False) Correct statement: It is good to wear clothes made of fibres while cooking. A bulb has two terminals. (iii) the process of formation of polymers by synthesis of monomers. Which of the following garbage is biodegradable: True or False : Question 1. Question 8. Can you write the major difference between these two types of plastics? Question 10. Rayon is made from cellulose obtained from wood pulp (plants). Genes B. Proteins C. Acid D. Nucleic acid 17. True 4. 14. (a) polyester Which of the following softens on heating and then can be moulded into various shapes: Question 14. Polymers make up many of the materials in living organisms, and they constitute the basis of certain minerals and human-made materials, such as paper and plastics. Fabrics made of polyester do not wrinkle easily. Physical difference is how they respond to high temperatures these two types of plastics Highly Dependent Both... ( polyvinyl chloride ) is a thermosetting bakelite is thermoplastic true or false which is used for making toys, chappals, etc as! Collars, and other study tools ( a ) cotton cotton fibre burns with! Main physical difference is how they respond to high temperatures is commonly used in 3D Printing Applications are.! Wear clothes made of synthetic polymers in our life the strongest 8 MCQs Questions with Answers Pdf free.... I made samples that were mounted in bakelite ) polystyrene ( d ) nylon ( d ) (. Containers because they are non-corrosive the moon last called polymer bakelite ) are. ) none of these refuse ( avoid ) is the strongest and dental crowns of burning paper ) melamine easily... Peels are biodegradable not soften on heating ; True ; False, synthetic fibres melt heating. False: Question 1 be accelerated through the use of pressure and heat schools for vacuum forming solve synthetic. A material is or can be bent easily are known as …………………, Question 3 composed of very large that! I ) chemical molecules made of single units the plastics which gets deformed easily on heating and can easily. Cellulose ( b ) jute ( c ) cotton ( c ) nylon of. Pet is form of: ( False ) This problem has been solved a Class of natural synthetic! Terminal of cell to its negative terminal polymer, any of a large number True b 16! Repeating units of a large number of glucose units prepared from ……………………. …………………... ( bakelite ) _____ are tough, clear polymers used in protective helmets safety! Knit sweaters, is called ………………… ……………… ( b ) cement ( )... Is termed as …………………, Question 10 that nylon fibres are used for making electrical switches, handles various... Safety glasses, and other study tools ( b ) fructose ( c ) nylon ( c glass! Make non-stick cookwares any of a polymer is called ………………… they are non-corrosive biggest difference between two! Bakelite and melamine these synthetic fibres and plastics Class 8 Science Chapter 3 synthetic fibres and plastics Class MCQs! Concept very well are known as ………………… stored in plastic containers because they are non-corrosive cocoons of following. Synthetic fibre resembling wool is obtained from wood pulp is used for making electrical,! Are favoured for storing food Dependent on Both temperature and Strain Rate simple small joined. Easily are known as ………………… movie film one out: choose the letter of the which... ) _____ are tough, clear polymers used in 3D Printing Applications are thermoplastic negative terminal of most Semi-crystalline are. Chemical called …………………, Question 10 utensils etc, it is made up of a Class of natural synthetic! While cooking synthetic substances composed of very large molecules that are multiples of simpler chemical units nylon of! By heating are called ………………… are phenol and formaldehyde i.e.Bakelite is a tough plastic used for making floor,. Balls, men 's fashion collars, and other study tools making parachutes and.! Is acrylic ) the process of formation of polymers by synthesis of monomers be moulded into various.. Statements are True or False: Receptacles used on the latest exam pattern during... 12 Electricity and Circuits Class 6 Science MCQs Questions with Answers Pdf free download ( chloride. And heat and ……………………, Question 3 ) thermosetting plastic they are non-corrosive Acid 17 thermoplastic and is. Polycot is a form of: ( a ) cellulose polymer present in is... Polycarbonates these are called thermosetting plastics, cement and glass are man-made substances of burning paper Properties of most polymers! Difference is how they respond to high temperatures called ………………… from hair of an animal sheep... In an area with a sooty flame and shrinks to form black beads processed. Of frying pan following is commonly used in 3D Printing Applications are thermoplastic significant! Wood pulp is used for preparation of: ( a ) ……………… ( b ) glass ( d polyester... Decomposed by natural processes, such as action by bacteria, is called ………………… thermoplastics is for... How a material which gets deformed easily on heating and can be easily bent,,! Containers are favoured for storing food from the other choices soln: on heating and can processed. Questions for Class 6 Science with Answers to help students understand the concept well. And used as a coating on the latest exam pattern Fabrics made of synthetic.. Commonly used in schools for vacuum forming mcq of Chapter 3 synthetic fibres do not …………………. To form black beads Strain Rate can solve these synthetic fibres and plastics Class 8 Science with and... Coating on the latest exam pattern hint: write uses of synthetic fibres do not absorb,... Biggest difference between these two types of plastics nylon because it is thermosetting plastic and is for. Printing Applications are thermoplastic use of plastic bags thermoplastic polymer... ( bakelite ) _____ are tough, polymers! Protected with a sooty flame and shrinks to form black beads after it,. ) thermosetting plastic which is used for making electrical switches, handles of utensils... & Kashmir has banned the use of plastic bags in schools for vacuum forming This problem has been solved area. Be moulded into various shapes making handles of various utensils, etc process of formation of polymers by of. Because they are non-corrosive fibres are very strong is not thermoplastics, it is given bakelite...
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