Which of these fibres is made from raw material obtained from plants: True 11. FALSE; Which of the following is commonly used in schools for vacuum forming? Bakelite is a thermosetting plastic and is used for making electrical switches, handles of various utensils, etc. Answer: Thermoplastic The plastic which gets deformed easily on heating and can bern easily is. Question 20. We know that bakelite is a thermosetting plastics, which is used for making electrical switches, handles of various utensils, etc. (c) protein Which of the following once set do not soften on heating: (a) plastic toys Question 3. These are called thermosetting plastics e.g., bakelite and melamine. Write the importance of synthetic polymers in our life. A. Cellulose B. Starch C. Rubber D. DNA 15. In lab I made samples that were mounted in bakelite. Question 6. (c) nylon Current flows from positive terminal of cell to its negative terminal. Thermoplastic and thermoset materials both fall under the broad category of Polymers. When did organ music become associated with baseball? (a) acrylic The first significant application of plastics began with the development of Bakelite™. I thought that thermosets were "set solid" by a chemical reaction that was irreversible. Plastics are non-biodegradable. 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. Question 11. Which of the following fibre is natural polymer: (c) hining C. CH 3 CHO. As in, if you heat up the plastic after it sets, it burns instead of melts. Question 27. [CBSE AIPMT 2008] A. (c) easy to handle Rayon is made from cellulose obtained from wood pulp (plants). The Mechanical Properties Of Most Semi-crystalline Polymers Are Highly Dependent On Both Temperature And Strain Rate. (a) steel ? Natural rubber has the trans-configuration at every double bond. Who is the longest reigning WWE Champion of all time? Answer: 1. MCQ Questions for Class 8 Science with Answers were prepared based on the latest exam pattern. (b) plastic bowls known as thermoplastic. (d) polyester and wool Answer: True. Question 14. (a) aluminium foil (c) polythene and wool (b) nylon Question 9. Telephone instruments can be recycled as it is made up of thermoplastics. Question 15. Melamine is not thermoplastics, it is thermosetting plastic. (a) aluminium foil (b) nylon Question 15. The starting monomers of bakelite are phenol and formaldehyde i.e.Bakelite is a thermosetting polymer. Question 12. Question 4. Most Polymers Used In 3D Printing Applications Are Thermoplastic. (d) none of these. (c) cotton 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. Polymerization of thermoplastic resin can be accelerated through the use of pressure and heat. Cotton clothes are more comfortable during hot/humid weather. Question 26. Which of the following is a thermosetting plastic: Question 4. Which of the following is not thermoplastics: See the answer. (a) polyester Acrylic, polyethylene and polystyrene are thermoplastic. Wire made from which fibre is strongest: (a) nylon (b) cotton (c) wool (d) steel. True or false: "(Sittin' On) the Dock of the Bay" by Otis Redding was the 1st posthumous No.1 single in America? Answer: (False) Correct statement: It is good to wear clothes made of fibres while cooking. True 5. We should wear synthetic clothes while working in the kitchen or in a laboratory. Question 5. (b) thermoplastic (d) polyester and wool. Nylon is synthetic whereas cotton, jute and silk are natural fibres. 21. Question 4. 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 ℃ Wood pulp is used for preparation of Rayon. (a) thermosetting plastic Cellulose is made up of a large number of glucose units. TRUE ? 21. (b) cellulose (a) cellulose 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. (b) non-corrosive ... thermoplastic and thermosetting does bakelite belong? b) Bakelite is a kind of thermosetting plastic which is a bad conductor of heat and electricity. (a) glucose A material which is not easily decomposed by natural processes is termed as …………………. (i) chemical molecules formed naturally like silk, cotton etc. (c) nylon 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. Rayon is made from cellulose obtained from wood pulp. (b) Reuse Which of the following fibre is synthetic: Fabrics made of …………………. ? On burning, plastics release ………………… gases. (b) nylon Question 10. Melamine is used for making floor tiles, kitchenware etc. Answer (a) nylon Wire made from nylon fibre is the strongest. (d) nylon (a) corrosive (a) artificial (b) teflon Teflon is used to make non-stick cookwares. Question 1. State whether the statements given below are True or False. 14. MCQ Questions for Class 8 Science with Answers were prepared based on the latest exam pattern. 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. (v) complex chemical molecules made of many type of single units. Copyright © 2020 Multiply Media, LLC. True 9. TRUE ? False 14. (iv) simple chemical molecules made of single unit. 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. (d) iron wastes. (c) telephone instruments Question 18. A bulb has two terminals. (b) cotton (b) polyester Question 24. True or False: Celluloid was used for billiard balls, men's fashion collars, and movie film. (c) rayon PET is form of: PET is a form of polyester. If plastics are burnt, they evolve oxygen gas. Give examples which indicate that nylon fibres are very strong. What are some samples of opening remarks for a Christmas party? (b) polyester and cotton (b) teflon (c) rayon Question 12. (a) rayon FALSE; Plastic is suitable for building large and heavy structures. Question 14. False 3. False 2. TRUE ? [CBSE AIPMT 2012] A. Question 2. (b) papers Polymer present in wood is: (b) cotton Thermoplastics is used for making handles of pressure cooker. True or False: Receptacles used on the job site should be protected with a GFCI. It is good to wear clothes made of synthetic fibres while cooking. 22. (d) none of these. 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. (b) polyester and cotton Have a glance at the MCQ of Chapter 3 Science Class 8 and cross-check your answers during preparation. Question 30. A synthetic fibre resembling wool is: 13. We have provided Electricity and Circuits Class 6 Science MCQs Questions with Answers to help students understand the concept very well. A long chain like molecule consisting of a large number of simple small molecules joined to each other by chemical bonds is called polymer. (c) cement The main physical difference is how they respond to high temperatures. Polywool is a mixture of ………………… and wool. (c) polythene and wool It cannot be reused. (c) polythene The fibre that burns readily with smell of burning paper is: Hint: Write uses of synthetic polymers like nylon, acrylic, terylene, PET, plastics, etc. (a) polyester The terms thermoplastic and thermoset stand for how a material is or can be processed under a changed temperature [1]. B (CH 2 OH) 2. (a) 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. Question 25. 3. Synthetic fibres are moth and insect resistant. ... Bakelite is obtained from phenol by reacting with [AIEEE 2008] A. HCHO. (d) steel. False 10. Preview this quiz on Quizizz. Explain the difference between thermoplastic and thermosetting plastics. FALSE; Epoxy resin is a thermoplastic? Question 16. (a) glucose (b) polyester and cotton Which of the following is used to make non-stick cookwares: Plastics are man-made materials. (a) polythene and cotton Question 6. (a) PVC Question 7. Silk fibre is obtained from cocoons of the silk moth. (d) bakelite. Question 21. Which of the following is not biodegradable: The material on this site can not be reproduced, distributed, transmitted, cached or otherwise used, except with prior written permission of Multiply. (c) telephone instruments Question 7. Food items are stored in plastic containers because they are non-corrosive. A synthetic fibre resembling wool is acrylic. (a) polyester Thermoplastic softens on heating and then can be moulded into various shapes. Nylon fibre is used for making nylon parachutes and ropes for rock climbing. (d) none of these. How many candles are on a Hanukkah menorah? (b) glass (d) wool. Question 17. (b) Recycle Question 13. (b) silk Why don't libraries smell like bookstores? PVC (polyvinyl chloride) is a thermoplastic and is used for making toys, chappals, etc. PVC (polyvinyl chloride) is a thermoplastic and is used for making toys, chappals, etc. Students can solve these Synthetic Fibres and Plastics Class 8 MCQs Questions with Answers and assess their preparation level. (b)cotton (iii) the process of formation of polymers by synthesis of monomers. Check the below NCERT MCQ Questions for Class 6 Science Chapter 12 Electricity and Circuits with Answers Pdf free download. Question 5. (d) bakelite D. CH 3 COCH 3. Question 8. 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Polymer present in plants is cellulose. Fruit peels are biodegradable. (c) acrylic (c) glass (a) thermoplastic 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 _____. (d) polyester. (d) polyester and wool. Electric plugs are made up ………………… plastics. Is Bakelite thermosetting or thermoplastic? Can you write the major difference between these two types of plastics? Question 20. Fabrics made of polyester do not wrinkle easily. Polyester fibres are used for making hand knit sweaters. Bakelite is used for making electrical switches, handles of various utensils etc. (d) all of these, (d) all of these Aluminium foil is not biodegradable. Question 2. (c) nylon Bakelite and melamine are thermoplastics. Question  14. ………………… is used for making ploythene bags. ? Plastics are corrosive in nature. Synthetic fibres are synthesised from raw material called …………………. Fill in the blanks. Question 2. Contact us for your Swiss made TCU! Question 4. Which of the following softens on heating and then can be moulded into various shapes: (ii) chemical molecules synthesized by human. B. Jammu & Kashmir has banned the use of plastic bags. Building blocks of DNA A. Synthetic fibres are also called ………………… fibres. (c) plastic covering on electric wires Bristles of tooth brush are made from nylon because it is soft, flexible and strong. Which one of the following statements is not true? State whether the following statements are True or False: Question 1. Join now. Fill in the blanks. (b) fructose Cotton fibre burns readily with smell of burning paper. (b) nylon Nylon is used for making parachutes and stockings. Question 28. (d) cooker handles. Question 8. ... False. True or False : Question 1. Rubber and wood are good conductors of electricity. Which of the following statements is false? (d) Recover, Question 9. ………………… has anti-stick property and used as a coating on the surface of frying pan. Question 5. Polycot is a mixture of: Answer 26. (b) thermosetting plastic Question 9. (d) P.V.C. Nylon was prepared from ……………………., ………………… and ……………………, Question 11. Wool is a natural fibre obtained from plants. (c) cotton Rayon is: (c) polyester (a) polyester Wire made from nylon fibre is the strongest. 4. Wood pulp is used for preparation of: Answer: True. (d) PET. Differentiate between thermoplastic and thermosetting plastics. Soln: On heating, Thermoplastics get deformed and they can be easily bent. (c) plastic covering on electric wires Can you write the major difference between these two types of plastics? 1. ………………… fabrics do not wrinkle easily. Question 13. 12. (b) thermoplastic Food hems are stored ¡n plastic containers because they are: (a) nylon (c) nylon (d) none of these. (d) rotten fruits. Short Answer Type. Question 11. FALSE; PVC is a thermoplastic. Polywool is a mixture of polyester and wool. False 8. (b) thermosetting plastic (d) nylon 5. (a) rayon True 7. Odd one out: choose the letter of the word that is not related from the other choices. (d) polythene. Bakelite is a thermosetting plastic. How long will the footprints on the moon last? A coating on the latest exam pattern, synthetic fibres do not soften on and... Natural rubber has the trans-configuration at every double bond polycarbonates these are called thermosetting plastics e.g., bakelite and...., bakelite and melamine form of polyester do not wrinkle easily collars and! Every double bond per the latest exam pattern substances composed of very large molecules that are multiples of chemical! Storing food the correct answer is … Sponsored by: Specialists in control! Fructose ( c ) rayon ( d ) melamine by: Specialists in temperature.. Prepared from ……………………., ………………… and ……………………, Question 11 bakelite is thermoplastic true or false is made up the... 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