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Best Answer (i) terylene could be the synthetic fibre B which contains a large number of ester groups (ii) Rayon could be the synthetic fibre C which is made of polymer D containing glucose (iii) Nylon could be the fibre A which is chemically a polyamide is nylon. Start studying Chapter 4: Fibers. Which is a synthetic fibre: nylon or Jute? 5 points Which of the following is not a synthetic fibre Ask for details ; Follow Report by Noniamadhuri 29.11.2019 Log in to add a comment What do you need to know? 30 seconds . If you are on a personal connection, like at home, you can run an anti-virus scan on your device to make sure it is not infected with malware. We have provided Synthetic Fibres and Plastics Class 8 Science MCQs Questions with Answers to help students understand the concept very well. Cellulose occurs in … 400 – 700 nm . Terylene belongs to polyester kind of synthetic fibres. Why is it not advisable to wear clothes made up of synthetic fibres in hot and humid weather? There are 15 questions in this test with each question having around four answer choices. 5. answer choices . 1 Pick the synthetic fibre out of the following. Manipal 2004: Which of the following is not a synthetic fibre? Q. SURVEY . Answer: a → 4, b → 3, c → 1, d → 2 Question 14: ‘Manufacturing synthetic fibres is actually helping conservation of forests’. Answer: A chain of a particular chemical substance is called a polymer. 2. option - (a)nylon,(b)silk,(c)polyester,(d) Rayon. Answer. Question 2: Define polymer? nylon. Which of the following is not a synthetic fibre? Explain why some fibres are called synthetic. It is ... All of the following are characteristics of synthetic fiber except. They are manmade and have a linear arrangement and are used to make products like toys, combs and containers. More Exercises on Our Universe, Chapter 18. 3 letter words MAT - NET - REP - … It is the first fully synthetic fibre. Which of the following is not a synthetic fibre? 700 – 1200 nm . A) Rayon done clear. Check out a sample Q&A here. Synthetic fibres are generally hydrophobic, i.e., they repel moisture (e.g., sweat) and do not absorb it. Electric wires are coated with— PVC ——. Force and Pressure Good conductor of electricity b. Wrinkle resistant c. High moisture absorbing capacity d. Poor elasticity please give me answers as soon as possible and if anyone give me correct answer I will mark him or her as 2011-02-19 14:10:30 2011-02-19 14:10:30. Acrylic is a synthetic fibre resembling wool used to knit sweaters, socks, and shawls.Polystyrene is also a synthetic fibre used for making protective packagings such as packing peanuts and CD and DVD cases, containers such as clamshells, lids, bottles, trays, tumblers, disposable cutlery and in the making of models.Therefore, option C and D both are correct. SURVEY . 5. Acrylic is the synthetic fibre feels like wool and used as a substitute for wool. It was prepared from coal, water and air Answer – Yes, it is true that the manufacturing of synthetic fibres is actually helping in the conservation of forests because nature fibre is mainly derived from plants. Ungraded . (2) State the property of thermosetting plastics? jute. Answer: (D) Incident at an angle greater than the critical angle. 3. Non-function of lachrymal gland is an important symptom of deficiency of Vitamin A 2. Plastic fiber optic cable c. Plastic clad silica fiber optic cable d. All of the above. Answer the following questions in short: 1. Cotton, jute and wool are natural fibres. (c) Wool pulp Students who are in Class 8 or preparing for any exam which is based on Class 8 Science can refer NCERT Science Book for their preparation. You may need to download version 2.0 now from the Chrome Web Store. Wool. Glass fiber optic cable b. Consider the following statements: 1. a. Â Explain why the following are made of thermosetting plastics: (a) Saucepan handles, (b) Electric plugs/switches/plug boards. This means cutting a lot of trees, which leads to deforestation. MCQ Questions for Class 8 Science with Answers were prepared based on the latest exam pattern. Along with it, the answer for each question has also been provided. 9. Question 1: Write some salient features of rayon. A full revision with question-answer and explanation in the form of MCQs based on latest CBSE Syllabus for new academic session 2020-2021. Question. MCQ Questions for Class 8 Science: Ch 3 Synthetic Fibres and Plastics Question. A full revision with question-answer and explanation in the form of MCQs based on latest CBSE Syllabus for new academic session 2020-2021. Name some artificial fibres. What of the following is used for making stockings and parachutes? * Which of the following is a natural fiber? Explain why some fibres are called synthetic. Chapter 11. Reaching the age of Adolescence  Model Test Papers, Notes and Exercise on Crop and Production Management. 10. Answer: Protein Question 3. It is very important for the students to get well versed with this NCERT Exemplar as it will aid them in gaining complete knowledge of the concepts included in Class 8 Science Chapter 3 Synthetic Fibres and Plastics. Answer: The fibres which are made from chemical substances or which are not obtained from the plant and animal sources are called synthetic fibres. Very Short Answer Type Questions. (a) Acrylic (b) Nylon (c) Polyester (d) Rayon. Synthetic Fibres Extra Questions Short Answer Type Questions. Synthetic Fibres and Plastics Class 8 MCQs Questions with Answers. Cotton is a soft, fluffy staple fibre that grows in a boll, or protective capsule, around the seeds of cotton plants. Answer. Answer: Some salient features of rayon are as follows: Rayon is … Terylene. Notes and Exercise on Crop and Production Management b. Polyvinyl chloride (PVC) c. Teflon. Class 8 Science Chapter 3 MCQ (Multiple Choice Questions) of Synthetic Fibres and Plastic. If the cloth catches fire it can be very disastrous. The fibres which are obtained by blending natural and synthetic fibres are called (a) joint fibres (b) mixed fibres (c) real fibres (d) artificial fibres 2. It is made without using any natural raw material. ANSWER: (b) Plastic fiber optic cable The plastic is first melted at high temperature and then forced out through a device with many holes in it known as a spinneret. Wool. This means cutting a lot of trees, which leads to deforestation. A blend of wool and kevlar, the synthetic fibre widely used in body armour, was lighter, cheaper and worked better in damp conditions than kevlar alone. Bakelite is a- synthetic polymer — plastic. Wiki User Answered . … ANSWER: (b) Photonic bandgap fiber. 103. NCERT Exemplar Class 8 Science Unit 3 Synthetic Fibres and Plastics. Comments. Which of the following is not a thermoplastic? 2: (c) Wool pulp Explanation: Rayon is obtained by the chemical treatment of wool pulp (which contains cellulose). (b) Synthetic fibres do not absorb sweat. (a) Wool (b) PET (c) Wood pulp (d) Silk Answer. A. Answer: Synthetic fibres have replaced natural fibres for most uses. wool. Fibres that are purely synthetic like nylons, polyesters, acrylics are made from chemicals whereas semisynthetic fibres such as rayons are produced with the utilization of natural polymers as raw material. More Notes on Pollution of Air and water. Silk is purely a natural product obtained from silk worms. ... answer choices . Class 8 Science Chapter 3 MCQ (Multiple Choice Questions) of Synthetic Fibres and Plastic. (1) Why are natural fibres preferred over synthetic fibres? Which of the following is used for making gunny … The fabric melts and sticks to the body of the person wearing it. Answer (c) nylon Nylon is synthetic whereas cotton, jute and silk are natural fibres. In contrast, nylon is a synthetic fibre obtained from plastics derived from petroleum. Polyester. C) Wool done clear. Which of the following is not a synthetic fibre: - 17092260 Which of the following is used for making gunny bags? Question: Explain how jute is obtained from the jute plant. After selecting the correct or incorrect answers, you can see the right answers with reason behind them. Examples of some synthetic fibres are rayon, nylon, etc. Answers: 1: (b) Nylon Explanation: It is a synthetic fibre. Name a natural fibre. Learn vocabulary, terms, and more with flashcards, games, and other study tools. The fibres are then separated from the … Class 8 Synthetic Fibres Plastics Question answers, Bakelite was originally used for electrical and mechanical parts, Chapter 1. 5. Q.1 Explain why some fibres are called synthetic. Which of the following is not due to total internal reflection of light? Question-answers (Fibre to Fabric) Multiple Choice Questions 1. D) Acrylic done clear. a. Free PDF Download of CBSE Science Multiple Choice Questions for Class 8 with Answers Chapter 3 Synthetic Fibres and Plastics. —– synthetic ——-fibre on burning, smells like burning paper. 8. (a) Synthetic fibres catch fire very easily. Which of the following is not a man-made material? 3 letter words MAT - NET - REP - … To which kind of synthetic fibres does terylene belong? Download CBSE Class 8 Science Synthetic Fibres and Plastics MCQs in pdf, Science chapter wise Multiple Choice Questions free, Chapter 3Synthetic Fibres and Plastics 1 A chain of small chemical units combined to form a large single unit is called ____a) Polymerb) Polyc) Polythene d. 400 – 7000 nm Question 3: What is the component of polyester?/p> Deficiency of Vitamin B, can lead to indigesion and heart enlargement 3. Please enable Cookies and reload the page. Which simple unit forms polymer? B) Nylon done clear. The fibres which are not natural and made by human beings are called synthetic fibres as they are manufactured by chemical processing of petrochemicals.These are made up of large units known as polymers. The following properties pertain to which fiber: high elongation,affected by sunlight, low absorbency, and high elastic recovery nylon This fiber was created as a wool substitute and is soft, warm, resilient and great for making lightweight blankets? Performance & security by Cloudflare, Please complete the security check to access. Which of the following is a synthetic polymer? a. Fabrics made from which of the following fibres is most suitable as umbrella cloth? Preview this quiz on Quizizz. Crop Production and Management, Chapter 7. - 15864661 4. We make a number of observations with different levels of flour added, and then get the following data: Fit a line to these points with linear regression and then draw both points and lines in a … 3. 2. Answer:cottonExplanation:because it natural and it is made without mixing any chemial 1. We've arranged the synonyms in length order so that they are easier to find. Synthetic fibres can either be completely synthetic or semisynthetic. (a) Bakelite (c) Wool (c) Nylon (d) Cotton. 3. a. Styrofoam. Answer. 1. Science. Which synthetic fibre is called artificial silk? Choose the correct option in the following questions: c. 300 – 2000 nm . Chapter 12. Synthetic Fibres and Plastics Class 8 Extra Questions Science Chapter 3 Synthetic Fibres and Plastics Class 8 Extra Questions Very Short Answer Questions Question 1. All of the following are characteristics of a synthetic fiber: Formed by combining monomer compounds into polymer molecules Man-made Used in the production of carpet fibers. The plastic used for making water pipes : The non-stick coating on frying pans is that of a plastic called: Which of these is thermosetting plastics? Cotton and wool are both obtained naturally in the fibrous form and no artificial methods are necessary to get these fibres. Now we have some fibres which are made from chemical substances. So clothes made of synthetic fibres are not comfortable to wear as they do not allow sweat to evaporate easily. 3. Q. Play this game to review Other. Synthetic fibers have the following advantages. Want to see the step-by-step answer? If you are at an office or shared network, you can ask the network administrator to run a scan across the network looking for misconfigured or infected devices. MCQ Questions for Class 8 Science with Answers were prepared based on the latest exam pattern. Give examples which indicate that nylon fibres are very strong. Comment. NCERT Class 8 Science Unit 3 is for Synthetic Fibres and Plastics. Students can solve NCERT Class 8 Science Synthetic Fibres and Plastics MCQs Pdf with Answers to know […] synthetic fibres class test DRAFT. Deficiency of Vitamin D causes increased loss of Ca++ in urine Which of the statements given above are correct? The synthetic polymer which can be used as a substitute for wool for making. Want to see this answer and more? Along with it, the answer for each question has also been provided. Which of the following fibre is synthetic: (a) cotton (b) jute (c) nylon (d) silk. Free Question Bank for 8th Class Science Synthetic Fibers and Plastics Synthetic Fibres and Plastics. Chapter 1. It is very easy to grow. Plastic which cannot be melted and moulded repeatedly? Answer – Yes, it is true that the manufacturing of synthetic fibres is actually helping in the conservation of forests because nature fibre is mainly derived from plants. a. The fibres which are obtained by blending natural and synthetic fibres are called (a) joint fibres (b) mixed fibres (c) real fibres (d) artificial fibres 2. NCERT Exemplar Class 8 Science Unit 3 Synthetic Fibres and Plastics. 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