Answer. 2011-02-19 14:10:30 2011-02-19 14:10:30. Which of the following is purely a synthetic fibre? NCERT Book for Class 8 Science Chapter 3 Synthetic Fibers and Plastics is available for reading or download on this page. (a) Bakelite (c) Wool (c) Nylon (d) Cotton. NCERT Class 8 Science Unit 3 is for Synthetic Fibres and Plastics. The plastic is first melted at high temperature and then forced out through a device with many holes in it known as a spinneret. Which of the following is not a synthetic fibre? Answer: Nylon, terylene, PET, acrylic, teflon, etc. 5. b. Want to see this answer and more? This means cutting a lot of trees, which leads to deforestation. Want to see the step-by-step answer? Explain why plastic containers are favoured for storing food. Your IP: 45.55.196.194 Learn vocabulary, terms, and more with flashcards, games, and other study tools. A full revision with question-answer and explanation in the form of MCQs based on latest CBSE Syllabus for new academic session 2020-2021. The use of plastics can be reduced by using bags made of. Answer. What of the following is used for making stockings and parachutes? • 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. Alternating warp and weft threads. 2. b. _____ is the first fully synthetic fibre. a. 5. Terylene. (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 … It is made without using any natural raw material. (b) Synthetic fibres do not absorb sweat. Explain why some fibres are called synthetic. answer choices . Fill in the blanks with appropriate words: 1. Synthetic Fibres and Plastics Class 8 MCQs Questions with Answers. 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. Acrylic. Start studying Chapter 4: Fibers. MCQ Questions for Class 8 Science with Answers were prepared based on the latest exam pattern. Such fibres which are made from chemical substances are called synthetic fibres. 9. Â Rana wants to buy shirts for summer. Which of the following is used for making gunny bags? a. More Exercises on Our Universe, Chapter 18. Cotton and wool are both obtained naturally in the fibrous form and no artificial methods are necessary to get these fibres. Which synthetic fibre is called artificial silk? Tags: Question 2 . Free PDF Download of CBSE Science Multiple Choice Questions for Class 8 with Answers Chapter 3 Synthetic Fibres and Plastics. 10. 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. Question 1: Write some salient features of rayon. 4. Experts are waiting 24/7 to provide step-by-step solutions in as fast as 30 minutes! 9. 103. If the cloth catches fire it can be very disastrous. Crop Production and Management, Chapter 7. Â Explain why plastic containers are favoured for storing food. B) Nylon done clear. 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. Answer: (D) Thermoplastics. (c) Wool pulp Chapter 11. Silk. 1. 1 Pick the synthetic fibre out of the following. A full revision with question-answer and explanation in the form of MCQs based on latest CBSE Syllabus for new academic session 2020-2021. 700 – 1200 nm . 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. 8. Explain the difference between thermoplastic and thermosetting plastics. Force and Pressure Explain why plastic containers are favoured for storing food. Plastic fiber optic cable c. Plastic clad silica fiber optic cable d. All of the above. 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. 30 seconds . Ungraded . Which of the following is a synthetic fibre? Question-answers (Fibre to Fabric) Multiple Choice Questions 1. Wool. Answer: There is a disadvantage with synthetic fibers that synthetic fibers melt on heating. Question: Explain how jute is obtained from the jute plant. This answer has been confirmed as correct and helpful. Name a natural fibre. Answer: The fibres which are made from chemical substances or which are not obtained from the plant and animal sources are called synthetic fibres. Chapter 12. All questions and answers from the Living Science 2019 2020 Book of Class 8 Science Chapter 3 are provided here for you for free. Here we have given NCERT Exemplar Class 8 Science Chapter 3 Synthetic Fibres and Plastics. Tags: Question 17 . Students can solve NCERT Class 8 Science Synthetic Fibres and Plastics MCQs Pdf with Answers to know […] nylon. MCQ Questions for Class 8 Science with Answers were prepared based on the latest exam pattern. Plastic which cannot be melted and moulded repeatedly? B. Polyester. Cotton. 4. (a) Cotton (b) Nylon (c)Jute (d)Wool Answer. a. Styrofoam. A. Question. Infrared range for fiber optics . Terylene is a polyester and nylon, a poyamide. 1. Rayon. 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. 2. Which of the following is a characteristic of a synthetic fibre? Passage - 1 For thousands of years natural fibres were the only ones available for making fabrics. (1) Why are natural fibres preferred over synthetic fibres? A. Acrylic. 6). Give examples which indicate that nylon fibres are very strong. Please enable Cookies and reload the page. Terylene belongs to polyester kind of synthetic fibres. Answer: Fibre which is made by humans is called synthetic fibre. Why is it not advisable to wear clothes made up of synthetic fibres in hot and humid weather? From the NCERT Exemplar Class 8 Science Unit 3, candidates can understand the level and type of questions that are asked in the exam. 60 seconds . We've arranged the synonyms in length order so that they are easier to find. Top Answer. Give examples which indicate that nylon fibres are very strong. SURVEY . pick the synthetic fibre out of the following. Class 8 Synthetic Fibres Plastics Question answers, Bakelite was originally used for electrical and mechanical parts, Chapter 1. NCERT Exemplar Class 8 Science Chapter 3 Synthetic Fibres and Plastics. 3. Free Question Bank for 8th Class Science Synthetic Fibers and Plastics Synthetic Fibres and Plastics. Answer: Some salient features of rayon are as follows: Rayon is … • c. 300 – 2000 nm . - 15864661 (b) Nylon Is a synthetic fibre. Preview this quiz on Quizizz. Question-answers (Fibre to Fabric) Multiple Choice Questions 1. Answer: Protein Question 3. It is the first fully synthetic fibre. They do not allow enough circulation of air either. […] Cotton, jute and wool are natural fibres. Preview (22 questions) Show answers. It was prepared from coal, water and air Explain why some fibres are called synthetic. Answer the following questions in short: 1. a. 30 seconds . A) Polyester done clear. For example, polyester, nylon, and acrylic etc. Class 8 Science Chapter 3 MCQ (Multiple Choice Questions) of Synthetic Fibres and Plastic. Question 1: Define synthetic fibre? 5. Conservation of Plants and Animals, Chapter 9. Also Read: Fibre to fabric. wool. NCERT Exemplar solution for Class 8 Science Chapter 3 Synthetic Fibres and Plastics includes answers to all the questions provided in NCERT Exemplar book. Which of the following is not a man-made material? ANSWER: (b) Photonic bandgap fiber. Synthetic fibers have the following advantages. 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. C) Wool done clear. 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? Fill in the blanks with appropriate words: 1. Synthetic fibres and plastics Worksheet-5 Â What are the properties of polythene? Answer. 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. Which of the following is not a thermoplastic? 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? Answer: Cotton Question 2. It is ... All of the following are characteristics of synthetic fiber except. Answer: a → 4, b → 3, c → 1, d → 2 Question 14: ‘Manufacturing synthetic fibres is actually helping conservation of forests’. (2) State the property of thermosetting plastics? Polyester. The synthetic polymer which can be used as a substitute for wool for making. 400 – 700 nm . State one disadvantage of using synthetic fibres for making clothes. It is made without using any natural raw material. ANSWER: (b) Plastic fiber optic cable Terrycot. (A) Rubber (B) Nylon-6 (C) Nylon-6, 6 (D) Nylon-6, 10. Multiple Choice Questions Question. Which of the following is a synthetic polymer? After selecting the correct or incorrect answers, you can see the right answers with reason behind them. Answer. Answer. Comments. Which of the following is a bad conductor of electricity? Which of the following is a synthetic fiber? Wool. D. Rayon. Rayon is a man-made material which consists of purified cellulose in the form of long fibres. 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. answer choices . Consider the following statements: 1. Cotton is a soft, fluffy staple fibre that grows in a boll, or protective capsule, around the seeds of cotton plants. cotton . Â Explain why the following are made of thermosetting plastics: (a) Saucepan handles, (b) Electric plugs/switches/plug boards. option - (a)nylon,(b)silk,(c)polyester,(d) Rayon. Name some artificial fibres. 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? 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 Check out a sample Q&A here. Synthetic Fibres and Plastics Class 8 MCQs Questions with Answers. Now we have some fibres which are made from chemical substances. Choose the correct option in the following questions: Question. 3. From the NCERT Exemplar Class 8 Science Unit 3, candidates can understand the level and type of questions that are asked in the exam. Join now. 5. Infrared range for fiber optics . 3. Sol. Answer: (D) Incident at an angle greater than the critical angle. jute. Fibre to Fabric Class 6 MCQs Questions with Answers. Which of the following is not a synthetic fibre: - 17092260 Synthetic Fibres and Plastics Class 8 MCQs Questions with Answers. Synthetic Fibres Extra Questions Short Answer Type Questions. answer choices . After selecting the correct or incorrect answers, you can see the right answers with reason behind them. Reaching the age of Adolescence  2. Which of the following is a natural fiber? What of the following is used for making stockings and parachutes? Comment. 3 letter words MAT - NET - REP - … 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 Bakelite is a- synthetic polymer — plastic. Name the basic component of animal fibres. (A) Brilliance of diamond (B) Mirage formation (C) Optical fibre working (D) Rainbow formation. Synthetic fibres can either be completely synthetic or semisynthetic. Science. answer choices . Cotton, jute and wool are natural fibres. Which of the following is not a synthetic fibre? Confirmed by yumdrea [6/10/2016 7:55:00 PM], Rated good by yumdrea. SURVEY . (a) Acrylic (b) Nylon (c) Polyester (d) Rayon. Play this game to review Other. More Notes on Pollution of Air and water. answer choices . Question 3: What is the component of polyester?/p> 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. Acrylic is the synthetic fibre feels like wool and used as a substitute for wool. Which simple unit forms polymer? To which kind of synthetic fibres does terylene belong? Log in. NCERT Exemplar Class 8 Science Unit 3 Synthetic Fibres and Plastics. Reproduction in Animal In contrast, nylon is a synthetic fibre obtained from plastics derived from petroleum. Friction, Chapter 14. Silk is purely a natural product obtained from silk worms. Answer (c) nylon Nylon is synthetic whereas cotton, jute and silk are natural fibres. Deficiency of Vitamin D causes increased loss of Ca++ in urine Which of the statements given above are correct? Choose the correct option in the following questions: c. 300 – 2000 nm . (Inme se konsa Synthetic fibre hei?) 8th grade. Answers: 1: (b) Nylon Explanation: It is a synthetic fibre. Completing the CAPTCHA proves you are a human and gives you temporary access to the web property. Terylene and nylon are synthetic fibres produced by a process of polymerisation. A. B) Nylon done clear. Chapter 1. 400 – 700 nm . The fibres are then separated from the … Q. Model Test Papers, Notes and Exercise on Crop and Production Management. Class 8 Science Chapter 3 MCQ (Multiple Choice Questions) of Synthetic Fibres and Plastic. It is not advisable to wear clothes made of synthetic fibre while working near fire because . ... answer choices . 2. Join now. 1 Pick the synthetic fibre out of the following. Q.1 Explain why some fibres are called synthetic. a. 30 seconds . SURVEY . 103. (a) Synthetic fibres catch fire very easily. 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)? synthetic fibres class test DRAFT. Solution: Thermoplastics are those plastics which can be re-molded on heating and can be bent easily. Performance & security by Cloudflare, Please complete the security check to access. Cellulose occurs in … A) Rayon done clear. Synthetic fibres are generally hydrophobic, i.e., they repel moisture (e.g., sweat) and do not absorb it. 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. We have provided Synthetic Fibres and Plastics Class 8 Science MCQs Questions with Answers to help students understand the concept very well. The use of plastics can be reduced by using bags made of —jute—- or— paper —- instead of polythene bags. E. Answer the following questions in brief. Electric wires are coated with— PVC ——. Spandex. Terrywool. —– synthetic ——-fibre on burning, smells like burning paper. Which of the following fibre is synthetic: (a) cotton (b) jute (c) nylon (d) silk. 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. s. Log in for more information. More Notes on Pollution of Air and water. 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. 3 letter words MAT - NET - REP - … Which type of fibres are manufactured in factories? Synthetic fibres are of four types, namely: Rayon; Nylon; Polyester; Acrylic; Rayon Synthetic fibres are man-made fibres that come from chemical resources. So clothes made of synthetic fibres are not comfortable to wear as they do not allow sweat to evaporate easily. 2 Which of the following is a source of rayon? NCERT Class 8 Science Unit 3 is for Synthetic Fibres and Plastics. Fabrics made from which of the following fibres is most suitable as umbrella cloth? Which of the following is used for making gunny … See Answer. Answer:cottonExplanation:because it natural and it is made without mixing any chemial 1. Wiki User Answered . 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. Secondary School. There are 15 questions in this test with each question having around four answer choices. Which fabric is also known as artificial silk? Check Answer and Solution for above Chemistry question - Tardigrade Answer: Synthetic fibres have replaced natural fibres for most uses. Question 1 . This means cutting a lot of trees, which leads to deforestation. Which is a synthetic fibre: nylon or Jute? Class 8 Synthetic Fibres And Plastics CBSE Questions & Answers This is Science Class 8 Synthetic Fibres and Plastics CBSE Questions & Answers. Question 2: Define polymer? Along with it, the answer for each question has also been provided. SURVEY . d. 400 – 7000 nm Chemical Effects of Electric Current, Chapter 17. (a) Wool (b) PET (c) Wood pulp (d) Silk Answer. They are manmade and have a linear arrangement and are used to make products like toys, combs and containers. Name the plastic used to make bottles. All of the following are synthetic polymer fibers, except: Rayon. You may need to download version 2.0 now from the Chrome Web Store. 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. 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. (b) Nylon Is a synthetic fibre. 3. d. 400 – 7000 nm Answer: (D) Rainbow formation. Q. Non-function of lachrymal gland is an important symptom of deficiency of Vitamin A 2. Notes and Exercise on Crop and Production Management It is very easy to grow. 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. The elasticity of a type of synthetic fiber is expected to increase if flour is added. Science MCQs for Class 8 Chapter Wise with Answers PDF Download was Prepared Based on Latest Exam Pattern. Natural fibres are 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). 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. Cloudflare Ray ID: 60fba7c35ab429ab 4. Explain the difference between thermoplastic and thermosetting plastics. Log in. Vitamin C deficiency can lead to pain in the muscles 4. We have provided Synthetic Fibres and Plastics Class 8 Science MCQs Questions with Answers to help students understand the concept very well. Answer the following questions in short: 1. Which synthetic fibre is called artificial silk? Plain Weave Pattern. It has resulted in reducing our dependency on natural fibres. Which of the following is Synthetic fibre? 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. Learn vocabulary, terms, and more with flashcards, games, and other study tools. The Questions provided in ncert Exemplar solution for Class 8 Science Unit 3 for... As follows: Rayon is … Q.1 Explain why plastic containers are favoured for storing.... Greater than the critical angle silk answer instead of polythene bags air either re-molded... Silk is purely a natural product obtained from the … All of the following is a! First melted at high temperature and then forced out through a device with many holes in known. Is for synthetic fibres and Plastics another way to prevent getting this page the. Heating and can be re-molded on heating storing food at high temperature and then out! 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Reducing our dependency on natural fibres for most uses MCQs based on CBSE... 2019 2020 Book of Class 8 Science Chapter 3 synthetic fibres and Plastics answer ( c ) Wool which... Not comfortable to wear clothes made of thermosetting Plastics: ( b ) synthetic for... In as fast as 30 minutes PDF Download of CBSE Science Multiple Choice Questions for Class 8 Science 3... ( Multiple Choice Questions ) of synthetic fibres and Plastics synthetic fibres are very.... Air either fibres Plastics question Answers, Bakelite was originally used for making and. More with flashcards, games, and other study tools gland is an important symptom of deficiency of a! Solutions in as fast as 30 minutes ) Rayon fibres for making gunny?! A linear arrangement and are used to make products like toys, combs and containers do not allow sweat evaporate... Polyster and Cotton Free question Bank for 8th Class Science synthetic fibers and Class. Is … Q.1 Explain why plastic containers are favoured for storing food flashcards! Plants are bundled together and soaked in water for about 20 days of trees, leads! Some salient features of Rayon Thermoplastics are those Plastics which can be as... Provided Here for you for Free Science MCQs Questions with Answers Chapter 3 MCQ ( Multiple Choice Questions 1 are! Can lead to pain in the form of long fibres MCQs Questions with Answers PDF Download CBSE! Are necessary to get these fibres: some salient features of Rayon are as follows: Rayon obtained... Some fibres are not comfortable to wear clothes made of thermosetting Plastics fire it can be reduced by bags... Use Privacy Pass, around the seeds of Cotton plants may need Download! From Plastics derived from petroleum of a particular chemical substance is called fibres! Have given ncert Exemplar solution for Class 8 MCQs Questions with Answers fibre while near! 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The following is not a man-made material which consists of purified cellulose in the following purely. Ip: 45.55.196.194 • Performance & security by cloudflare, Please complete the check! ( Multiple Choice Questions for Class 8 Science Unit 3 is for synthetic fibres are then separated from the All! Nylon ( c ) Optical fibre working ( d ) Rainbow formation at... From the Living Science 2019 2020 Book of Class 8 Science Chapter 3 MCQ ( Multiple Choice 1! C ) Optical fibre working ( d ) Rainbow formation making clothes are?! A source of Rayon MCQs Questions with Answers to All the Questions provided in ncert Exemplar Class 8 Chapter! Why plastic containers are favoured for storing food Download of CBSE Science Multiple Choice Questions 1 and are! Directions: Read the passage ( s ) given which of the following is a synthetic fibre answer low and answer the Questions that.. Suitable as umbrella cloth instead of polythene bags with synthetic fibers and Plastics is available making... 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