From the NCERT Exemplar Class 8 Science Unit 3, candidates can understand the level and type of questions that are asked in the exam. (a) Wool (b) PET (c) Wood pulp (d) Silk Answer. Preview (22 questions) Show answers. All of them. • Join now. You can refer to NCERT Solutions for Class 8 Science Chapter 3 Synthetic Fibres and Plastics to revise the concepts in the syllabus effectively and improve your chances of securing high marks in your board exams. After harvesting, the stalks of jute plants are bundled together and soaked in water for about 20 days. (A) Brilliance of diamond (B) Mirage formation (C) Optical fibre working (D) Rainbow formation. Comment. answer choices . Polyester. Tags: Question 22 . Solution: Thermoplastics are those plastics which can be re-molded on heating and can be bent easily. MCQ Questions for Class 8 Science with Answers were prepared based on the latest exam pattern. SURVEY . a. Glass fiber optic cable b. Choose the correct option in the following questions: Sol. Here we have given NCERT Exemplar Class 8 Science Chapter 3 Synthetic Fibres and Plastics. These solutions for Synthetic Fibres And Plastics are extremely popular among Class 8 students for Science Synthetic Fibres And Plastics Solutions come handy for quickly completing your homework and preparing for exams. More Exercises on Our Universe, Chapter 18. 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. 4. 8. Terrycot. C. Nylon. 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. 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? You can refer to NCERT Solutions for Class 6 Science Chapter 3 Fibre to Fabric to revise the concepts in the syllabus effectively and improve your chances of securing high marks in your board exams. Answer: Synthetic fibres have replaced natural fibres for most uses. Synthetic fibres and plastics Worksheet-5 Â What are the properties of polythene? 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. Start studying Chapter 4: Fibers and Textiles. Which of the following is used for making gunny bags? (3) Give reason for the following (a) polyester is not suitable for summer (b) use of plastic today is a matter of concern (c) nylon derives its name from two cities (d) plastic is … Manipal 2004: Which of the following is not a synthetic fibre? Cotton. 10. A) B. Polyester. Synthetic fibers have the following advantages. Which of the following is a synthetic fibre? Class 8 Synthetic Fibres Plastics Question answers, Bakelite was originally used for electrical and mechanical parts, Chapter 1. (a) Acrylic (b) Nylon (c) Polyester (d) Rayon. 9. Please enable Cookies and reload the page. Answer: (D) Thermoplastics. 2. Name a natural fibre. 30 seconds . More Notes on Pollution of Air and water. This means cutting a lot of trees, which leads to deforestation. Natural fibres are Answer. Plain Weave Pattern. answer choices . Choose the correct option in the following questions: Class 8 Science Chapter 3 MCQ (Multiple Choice Questions) of Synthetic Fibres and Plastic. Which of the following is a characteristic of a synthetic fibre? Q.1 Explain why some fibres are called synthetic. Which synthetic fibre is called artificial silk? * Non-function of lachrymal gland is an important symptom of deficiency of Vitamin A 2. Question 3: What is the component of polyester?/p> A) Polyester done clear. 700 – 1200 nm . The use of plastics can be reduced by using bags made of —jute—- or— paper —- instead of polythene bags. MCQ Questions for Class 8 Science with Answers were prepared based on the latest exam pattern. NCERT Class 8 Science Unit 3 is for Synthetic Fibres and Plastics. 3 letter words MAT - NET - REP - … 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. Terrywool. Now we have some fibres which are made from chemical substances. See Answer. Ungraded . Another way to prevent getting this page in the future is to use Privacy Pass. 2: (c) Wool pulp Explanation: Rayon is obtained by the chemical treatment of wool pulp (which contains cellulose). There are 15 questions in this test with each question having around four answer choices. Free PDF Download of CBSE Science Multiple Choice Questions for Class 8 with Answers Chapter 3 Synthetic Fibres and Plastics. Answers: 1: (b) Nylon Explanation: It is a synthetic fibre. 2. 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. (a) Cotton (b) Nylon (c)Jute (d)Wool Answer. d. 400 – 7000 nm The plastic is first melted at high temperature and then forced out through a device with many holes in it known as a spinneret. Fabrics made from which of the following fibres is most suitable as umbrella cloth? Log in. State one disadvantage of using synthetic fibres for making clothes. We have provided Synthetic Fibres and Plastics Class 8 Science MCQs Questions with Answers to help students understand the concept very well. Cotton, jute and wool are natural fibres. We've arranged the synonyms in length order so that they are easier to find. Deficiency of Vitamin D causes increased loss of Ca++ in urine Which of the statements given above are correct? […] Which of the following is not a thermoplastic? 1 Pick the synthetic fibre out of the following. DIRECTIONS: Read the passage (s) given be low and answer the questions that follow. Answer: (D) Incident at an angle greater than the critical angle. D. Rayon. Answer: Some salient features of rayon are as follows: Rayon is … Completing the CAPTCHA proves you are a human and gives you temporary access to the web property. Multiple Choice Questions Question. Â Explain why the following are made of thermosetting plastics: (a) Saucepan handles, (b) Electric plugs/switches/plug boards. Passage - 1 For thousands of years natural fibres were the only ones available for making fabrics. Silk is purely a natural product obtained from silk worms. Types of Synthetic Fibers. Synonyms, crossword answers and other related words for SYNTHETIC FIBRE [nylon] We hope that the following list of synonyms for the word nylon will help you to finish your crossword today. A. pick the synthetic fibre out of the following. (c) Wool pulp Question. - 15864661 Comments. 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. The fibres are then separated from the … It was prepared from coal, water and air Secondary School. Force and Pressure From the NCERT Exemplar Class 8 Science Unit 3, candidates can understand the level and type of questions that are asked in the exam. Chapter 12. Wool. Which of the following is not a synthetic fibre: - 17092260 It has resulted in reducing our dependency on natural fibres. It is the first fully synthetic fibre. Reaching the age of Adolescence  A full revision with question-answer and explanation in the form of MCQs based on latest CBSE Syllabus for new academic session 2020-2021. Such fibres which are made from chemical substances are called synthetic fibres. Question 1: Write some salient features of rayon. (a) Plastic (b) Copper (c) Steel (d) Brass. After selecting the correct or incorrect answers, you can see the right answers with reason behind them. Terylene is a polyester and nylon, a poyamide. Answer: Fibre which is made by humans is called synthetic fibre. Â Explain why plastic containers are favoured for storing food. Friction, Chapter 14. 4. In contrast, nylon is a synthetic fibre obtained from plastics derived from petroleum. 3. 3: (d) Polyster and cotton Wool. Terylene and nylon are synthetic fibres produced by a process of polymerisation. Name the basic component of animal fibres. (A) Rubber (B) Nylon-6 (C) Nylon-6, 6 (D) Nylon-6, 10. Start studying Chapter 4: Fibers. Confirmed by yumdrea [6/10/2016 7:55:00 PM], Rated good by yumdrea. Cotton and wool are both obtained naturally in the fibrous form and no artificial methods are necessary to get these fibres. (b) Nylon Is a synthetic fibre. Answer (c) nylon Nylon is synthetic whereas cotton, jute and silk are natural fibres. Which of the following is not a synthetic fibre? • Answer: A chain of a particular chemical substance is called a polymer. To which kind of synthetic fibres does terylene belong? 700 – 1200 nm . Answer: (D) Rainbow formation. Free Question Bank for 8th Class Science Synthetic Fibers and Plastics Synthetic Fibres and Plastics. option - (a)nylon,(b)silk,(c)polyester,(d) Rayon. Deficiency of Vitamin B, can lead to indigesion and heart enlargement 3. Fibre to Fabric Class 6 MCQs Questions with Answers. 103. All of the following are synthetic polymer fibers, except: Rayon. 5. Which of the following is a synthetic polymer? 4. 1 Pick the synthetic fibre out of the following. A. Jute B. Rayon C. Ramie D. Sisal Rayon is a synthetic fiber. Which synthetic fibre is called artificial silk? 2011-02-19 14:10:30 2011-02-19 14:10:30. Which of the following is a bad conductor of electricity? 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 400 – 700 nm . More Notes on Pollution of Air and water. Wiki User Answered . 400 – 700 nm . 1. 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. Q. Synthetic Fibres Extra Questions Short Answer Type Questions. Question 1 . Students can solve NCERT Class 8 Science Synthetic Fibres and Plastics MCQs Pdf with Answers to know […] Plastic which cannot be melted and moulded repeatedly? Tags: Question 17 . Why is it not advisable to wear clothes made up of synthetic fibres in hot and humid weather? 1. Name the plastic used to make bottles. The use of plastics can be reduced by using bags made of. SURVEY . 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? 5. 2 Which of the following is a source of rayon? Chapter 10. NCERT Exemplar Class 8 Science Unit 3 Synthetic Fibres and Plastics. Synthetic fibres are generally hydrophobic, i.e., they repel moisture (e.g., sweat) and do not absorb it. Question: Explain how jute is obtained from the jute plant. Play this game to review Other. Rayon. Name some artificial fibres. Answer: Jute fibre is obtained from jute plant by the following steps: Retting: Jute fibre is obtained from the stalks of the jute plant. What of the following is used for making stockings and parachutes? Answer: Cotton Question 2. We've arranged the synonyms in length order so that they are easier to find. 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 … Synthetic Fibres and Plastics Class 8 MCQs Questions with Answers. Which type of fibres are manufactured in factories? Answer. Explain why plastic containers are favoured for storing food. NCERT Exemplar Class 8 Science Chapter 3 Synthetic Fibres and Plastics. pick the synthetic fibre out of the following. Which of the following is not a synthetic fibre? _____ is the first fully synthetic fibre. … Science MCQs for Class 8 Chapter Wise with Answers PDF Download was Prepared Based on Latest Exam Pattern. Chapter 1. Silk. D) Acrylic done clear. (1) Why are natural fibres preferred over synthetic fibres? c. 300 – 2000 nm . Acrylic. Answer:cottonExplanation:because it natural and it is made without mixing any chemial 1. 5. 103. This means cutting a lot of trees, which leads to deforestation. Performance & security by Cloudflare, Please complete the security check to access. c. 300 – 2000 nm . Class 8 Synthetic Fibres And Plastics CBSE Questions & Answers This is Science Class 8 Synthetic Fibres and Plastics CBSE Questions & Answers. NCERT Class 8 Science Unit 3 is for Synthetic Fibres and Plastics. nylon. Infrared range for fiber optics . Rayon is a man-made material which consists of purified cellulose in the form of long fibres. They are manmade and have a linear arrangement and are used to make products like toys, combs and containers. A) Rayon done clear. 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. Plastic fiber optic cable c. Plastic clad silica fiber optic cable d. All of the above. 6). All questions and answers from the Living Science 2019 2020 Book of Class 8 Science Chapter 3 are provided here for you for free. 5. 2. 11) Which type of fiber optic cable has/have its/their core with the size of about 480 μm to 980 μm & made up of polymethylmethacrylate (PMMA)? 3. jute. They are uncomfortable in those works. 3 letter words MAT - NET - REP - … a. 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 Cloudflare Ray ID: 60fba7c35ab429ab A full revision with question-answer and explanation in the form of MCQs based on latest CBSE Syllabus for new academic session 2020-2021. Acrylic is the synthetic fibre feels like wool and used as a substitute for wool. Give examples which indicate that nylon fibres are very strong. Which of the following fibre is synthetic: (a) cotton (b) jute (c) nylon (d) silk. Along with it, the answer for each question has also been provided. answer choices . Science. (Inme se konsa Synthetic fibre hei?) Which of the following is not a man-made material? Experts are waiting 24/7 to provide step-by-step solutions in as fast as 30 minutes! Also Read: Fibre to fabric. Conservation of Plants and Animals, Chapter 9. It is made without using any natural raw material. Infrared range for fiber optics . SURVEY . Electric wires are coated with— PVC ——. Â Rana wants to buy shirts for summer. Spandex. Tags: Question 2 . Terylene belongs to polyester kind of synthetic fibres. 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. d. 400 – 7000 nm a. Chemical Effects of Electric Current, Chapter 17. Which of the following is used for making gunny … Which of the following is purely a synthetic fibre? Cotton is a soft, fluffy staple fibre that grows in a boll, or protective capsule, around the seeds of cotton plants. Along with it, the answer for each question has also been provided. Class 8 Science Chapter 3 MCQ (Multiple Choice Questions) of Synthetic Fibres and Plastic. Want to see this answer and more? Which of the following is a synthetic fiber? wool. 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. Question-answers (Fibre to Fabric) Multiple Choice Questions 1. It is not advisable to wear clothes made of synthetic fibre while working near fire because . Q. 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. 2. Consider the following statements: 1. It is ... All of the following are characteristics of synthetic fiber except. a. Styrofoam. We have provided Synthetic Fibres and Plastics Class 8 Science MCQs Questions with Answers to help students understand the concept very well. Chapter 11. Which fabric is also known as artificial silk? cotton . Model Test Papers, Notes and Exercise on Crop and Production Management. If the cloth catches fire it can be very disastrous. Learn vocabulary, terms, and more with flashcards, games, and other study tools. This answer has been confirmed as correct and helpful. 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. 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? Alternating warp and weft threads. Which of the following is a bad conductor of electricity? The elasticity of a type of synthetic fiber is expected to increase if flour is added. b. Polyvinyl chloride (PVC) c. Teflon. Answer. A. (b) Synthetic fibres do not absorb sweat. 9. 30 seconds . Fill in the blanks with appropriate words: 1. Fill in the blanks with appropriate words: 1. Explain the difference between thermoplastic and thermosetting plastics. ANSWER: (b) Plastic fiber optic cable It is the first fully synthetic fibre. Vitamin C deficiency can lead to pain in the muscles 4. —– synthetic ——-fibre on burning, smells like burning paper. NCERT Exemplar Class 8 Science Unit 3 Synthetic Fibres and Plastics. a. Examples of some synthetic fibres are rayon, nylon, etc. Want to see the step-by-step answer? Answer: Protein Question 3. Cellulose occurs in … 30 seconds . After selecting the correct or incorrect answers, you can see the right answers with reason behind them. 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Been provided reading or Download on this page cottonExplanation: because it natural and is. Not allow enough circulation of which of the following is a synthetic fibre answer either the security check to access: fibres... Thermosetting Plastics synthetic fibers and Plastics includes Answers to All the Questions provided ncert. Mixing any chemial 1 in it known as a substitute for Wool for making gunny?... The CAPTCHA proves you are a human and gives you temporary access to the web property reduced... Polyster and Cotton Free question Bank for 8th Class Science synthetic fibers that synthetic fibers on! Syllabus for new academic session 2020-2021 to All the Questions provided in Exemplar. Diamond ( b ) nylon ( d ) Rainbow formation of Vitamin d causes increased loss of Ca++ in which... Of a synthetic fibre chemical substance is called a polymer Rayon C. Ramie D. Rayon.