The properties of synthetic fibres are as follows-. Name any two types of polyesters and their uses.Â, Answer: Fabric made from polyester does not get wrinkled easily. The advantages of using plastic containers for storing food are written as below: They do not react with food and prevents the food from spoiling.          (a) layers                                (b) molecules PET is a very familiar form of polyester.         (c) PVC                                 (d) Polythene, 07. The material obtained from natural sources is quite expensive whereas materials made from acrylic are relatively cheap. For example: Bakelite etc. Your email address will not be published. What is the name of first fully synthetic fiber? (function (w, d) { for (var i = 0, j = d.getElementsByTagName("ins"), k = j[i]; i < j.length; k = j[++i]){ Polymers are made up of small units called _____,          (a) layers                                (b) molecules,          (c) cells                                  (d) monomers, 04. It is durable as it has high tenacity or strength. False 10. Why has government banned the use of polythene bags ?Â, Polythenes or plastic bags are non biodegradable. Blockage and choking of drains and sewer lines . Plastics can be recycled, reused, colored melted, rolled into sheets or made into wires. Plastic is also defined as a material that can be heated and molded in any shape after cooling. Double taxation is a distinct advantage that corporations have over other forms of ownership. Mineral fiber (like asbestos). 9. Plastic is made from petroleum and natural gas. It is manufactured regenerated cellulose fiber. Answer: Wool There are certain fibers which are obtained from plants and are known as vegetable fibers. True or false? It means that they cannot be decomposed or recycled by the microorganisms.        (a) Saucepan handles So, it is quite suitable for making dress material. PET (Polyethylene terephthalate), the commonly used polyester, is made from two monomers by condensation polymerization. Synthetic fibers are more durable and affordable which makes them more popular than natural fibers.Â, The disadvantages of plastics are as follows –. } 10. 3.         (c) Cellulose                       (d) Polyester, 14. We should buy products with less plastic packaging. It means not extra care is required. Answer: 1. 15. There are some plastics which when molded once cannot be softened by heating again and again. ... A _____ is a plastic card that has a microchip loaded with identifying data. Synthetic fibers are synthesized from raw material called â¦â¦….. Like synthetic fibers, plastic is also a ……….. Give examples which indicate that nylon fibers are very strong. Regular Ziploc bags can be used safely for brining. In this chapter we will discuss about fibers and plastics in detail. In a typical household wire, the metal interior (ie. Therefore, it is used in hot and humid climates. What are polycot and polywool? Rayon is used in textile industry for making shirts, skirts etc. The lesson covers all important questions based on Synthetic Fibres and Plastics. c. In______ weather clothes made of synthetic fiber stick to the body.         (a) Protein                          (b) Fructose a. Rayon is prepared from ______ . The first fully synthetic fiber was _______? Tie it to the clam so that it hangs freely. ((w.adpushup = w.adpushup || {}).control = (w.adpushup.control || [])).push(k); Answer: Cellulose Synthetic fibers synthesized from raw materials are called _____,         (a) jute                                 (b) rayon,         (c) petrochemicals               (d) Bakelite,         (a) fibre                              (b) elastomer,         (c) nylon                             (d) thermosetting polymer. It can also be slit or spun into synthetic fibres or modified to take on the elastic properties of a rubber. We have provided Chemical Effects of Electric Current Class 8 Science MCQs Questions with Answers to help students understand the concept very well. Â, Question: By which material is artificial wool formed? Like polythene, is a non-biodegradable substance which means that microorganisms cannot decompose them. False Title: ANSWER: F REFERENCE: Corporations: Limiting Your Liability LEARNING OUTCOME: 4 RATIONALE: Double taxation is a distinct disadvantage. The first fully synthetic fiber was _______? ______ burns slowly with the smell of burning hair.        (c) Rayon                           (d) Ketone. HDPE, by contrast, has common applications in construction (for example, in its use in the fabrication of drain pipes). For example, LDPE is widely used in plastic packaging, such as for grocery bags or plastic wrap. 3. Name the plastic used for making insulation cover of electrical wires? plastic (polythene) 49. For example: Viscose comes from pine trees. Rayon clothes are comfortable to wear in ____? For example, plasticizers like adipates and phthalates are often added to brittle plastics like polyvinyl chloride to make them pliable enough for use in food packaging, toys, and many other items. An example of two "Class B" fuels would be: ... An APW (water extinguisher) is safety is on an electrical fire? It is lightweight. 01. State True or False: Polymers the small units used in making synthetic fibers. Question: What is the difference between Thermosetting and Thermoplastics? Water is an example of a chemical element. d. ______ burns readily with the smell of burning paper. For example, polythene is made of many ethene monomer units. It is also called artificial silk.         (a) nylon                                 (b) rayon (i) poor conductors of electricity These are man-made polymers extensively used in daily life as well as in industry, e.g. Take a cotton thread of about 60 cm length. The structure of polymer can be compared to that of a bead necklace- the bead being the monomers. Bakelite is used for making electrical switches, handles of various utensils etc. What is the other name for artificial silk? It is therefore advised not to wear synthetic clothes while working in a laboratory or working with fire in the kitchen. Answer: Thermoplastics CBSE Class 8 Science Lessons Explanation, Notes, NCERT Question Answers, ← Crop Production and Management Class 8 CBSE Science Notes, Question Answers, Microorganisms Class 8 Notes, Question Answers →, Chapter 1 How, When and Where Class 8 History Explanation, Question Answers, Chapter 2 From Trade to Territory â The company establishes power Class 8 History, Explanation, Question Answers, Chapter 3 Ruling the Countryside Class 8 History Explanation, Question and Answers, Chapter 4 Tribals, Dikus and the Vision of a Golden Age Class 8 History Explanation, Chapter 5 When people rebel – 1857 and after Class 8 History Explanation, Chapter 6 Weavers Iron Smelters and Factory Owners Class 8 History, Explanation, Chapter 1 The Indian Constitution, Class 8 Civics Explanation, Question and Answers, Chapter 2 Understanding Secularism, Class 8 Civics Explanation, Question and Answers, Chapter 3 Why do we need a Parliament, Class 8 Civics Explanation, Question and Answers, Chapter 4 Understanding laws, Class 8 Civics Explanation, Question and Answers, Chapter 5 Judiciary Class 8 Civics Explanation, Question and Answers, Chapter 6 Understanding Our Criminal Justice System Class 8 Civics Explanation, Question and Answers, Chapter 7 Understanding Marginalization, Class 8 Civics Explanation, Question and Answers, Chapter 8 Confronting Marginalisation, Class 8 Civics Explanation, Question and Answers, Chapter 9 Public Facilities, Class 8 Civics Explanation, Question and Answers, Chapter 10 Law and Social Justice, Class 8 Civics Explanation, Question and Answers, Chapter 1 Resources, Class 8 Geography lesson Explanation, Question and Answers, Chapter 2 Land, Soil, Water, Natural Vegetation and Wildlife Resources, Class 8 Geography Lesson Explanation, Question and Answers, Chapter 3 Mineral and Power Resources, Class 8 Geography lesson Explanation, Question and Answers, Chapter 4 Agriculture, Class 8 Geography lesson Explanation, Question and Answers, Chapter 5 Industries, Class 8 Geography lesson Explanation, Question and Answers, Chapter 6 Human Resources, Class 8 Geography lesson Explanation, Question and Answers, Chapter 1 Crop Production and Management Class 8 CBSE Science Notes, Question Answers, Chapter 2 Microorganisms Class 8 Notes, Question Answers, Chapter 3 Synthetic fibres and Plastics Class 8 Notes, Question Answers, Chapter 4 Metals and Non Metals Class 8 Notes, Question Answers, Chapter 5 Coal and Petroleum Class 8 Notes, Question Answers, Chapter 6 Combustion and Flame Class 8 Notes, Question Answers, Chapter 7 Conservation of plants and animals Class 8 Notes, Question Answers, Chapter 8 Cell Structure and Function Class 8 Notes, Question Answers, Chapter 9 Reproduction Class 8 Notes, Question Answers, Explanation, Chapter 10 Reaching the age of adolescence Class 8 Notes, Question Answers, Explanation, Chapter 11 Force and Pressure Class 8 Notes, Question Answers, Explanation, Chapter 12 Friction Class 8 Notes, Question Answers, Explanation, Chapter 13 Sound Class 8 Notes, Question Answers, Explanation, Chapter 14 Chemical Effects of Electric Current Class 8 Notes, Question Answers, Explanation, Chapter 15 Some Natural Phenomena Class 8 Notes, Question Answers, Explanation, Chapter 16 Light Class 8 Notes, Question Answers, Explanation, Chapter 17 Stars and the Solar System Class 8 Explanation, Notes, Examples, Question Answers, Chapter 18 Pollution of Air and Water Class 8 Explanation, Notes, Examples, Question Answers, Chapter 1 Dhwani Class 8 Summary, Explanation, Question Answers, Chapter 2 Lakh Ki Chudiyan Class 8 Summary, Explanation, Question Answers, Difficult Words, Chapter 3 Bus Ki Yatra Class 8 Summary, Explanation, Question Answers, Chapter 4 Deewano ki Hasti Class 8 Summary, Explanation, Question Answers, Chapter 5 Chitthiyon Ki Anoothi Duniya Class 8 Summary, Explanation, Question Answers, Chapter 6 Bhagwan Ke Dakiye Class 8 Summary, Explanation, Question Answers, Chapter 7 Kya Nirash Hua Jaye Class 8 Summary, Explanation, Question Answers, Chapter 8 Yeh Sabse Kathin Samay Nahi Class 8 Summary, Explanation, Question Answers, Chapter 9 Kabir Ki Saakhiyaan Class 8 Summary, Explanation, Question Answers, Chapter 10 Kamchor Class 8 Summary, Explanation, Question Answers, Chapter 11 Jab Cinema Ne Bolna Sikha Class 8 Summary, Explanation, Question Answers, Chapter 12 Sudama Charit Class 8 Summary, Explanation, Question Answers, Chapter 13 Jahan Pahiya hai Class 8 Summary, Explanation, Question Answers, Chapter 14 Akbari Lota Class 8 Summary, Explanation, Question Answers, Chapter 15 Surdas ke Pad Class 8 Summary, Explanation, Question Answers, Chapter 16 Pani ki Kahani Class 8 Summary, Explanation, Question Answers, Chapter 17 Baaz aur Saanp Class 8 Summary, Explanation, Question Answers, Chapter 18 Topi Class 8 CBSE Hindi Lesson, Summary, Explanation, Question Answers, Entrance Exams for Arts students after Graduation, List of Entrance Exams conducted by IGNOU.         (c) synthetic fibre                 (d) both (a) and (c), 09. Use of plastic bags survey questions is a questionnaire to understand the perception of the public on abolishing the use of plastic bags. Whatever you need, Abbey Polythene has the right product and if not, we'll make it especially for you. True or False True 28 One might expect to see a rock unit … Question: How can you show that thermoplastics are poor conductors of electricity? By signing up for this email, you are agreeing to news, offers, and information from Encyclopaedia Britannica. Plastics can be easily molded into any shape and sizes. They do not insulate body heat. You may be aware of a recent Friends of the Earth Europe and Zero Waste Europe report that claims that plastic packaging has no positive effect on food waste reduction. The synthetic fibers can be woven into a fabric, just like natural fiber. True 4. Name the plastic which cannot be softened once molded into a shape? We cover a range of industries and provide products such as clinical waste sacks, printed poly bags, plastic sheeting, EVA low melt polythene bags, tiger stripe sacks and much more. Sometimes brining in a food grade plastic bag is more convenient and takes less space in the refrigerator than using a bulky plastic container. 2. It is also used as linings for boots and gloves as well as in furnishing fabrics and carpets. For example, when used for house insulation, it keeps people´s homes warm, while cutting the energy they need to heat it. Terylene is a type of popular polyester. Acrylic fibers are advantageous over? Parachutes and ropes for rock climbing which indicates that nylon fibres are strong. The corporation's board of directors elects the corporate officers. If in case you are unable to identify the fiber, you can take help of your parents in selecting these pieces. ... is a serious problem. Wood pulp is used to make ______ 6. True 5. 10. Answer: mountaineers use nylon ropes for climbing the mountains because nylon is a high strength fiber so it does not break easily. Which of the following cannot be recycled? mountaineers use nylon ropes for climbing the mountains because. } d. Polyester is made from ______ products. 11. True 15. A) true B) false 17. This PET is used in the manufacturing of pet bottles like cold drink, water bottles. These are those substances that can be decomposed by microorganisms through natural processes. We have seen that those plastic covers do not cause any kind of electric shock when you touch it. For example: Plastic, polybags, clothes. Why do mountaineers use nylon ropes for climbing the mountains? They are used in making handles of utensils, floor tiles etc. Answer: Polyester is actually made by repeating the units of a chemical called ester. When plastics are burnt, toxic fumes are released into the atmosphere causing pollution. There are certain fibers which are obtained from plants and are known as vegetable fibers. TRUE or FALSE. We have seen that those plastic covers do not cause any kind of electric shock when you touch it. Causes of Plastic Pollution The reckless dumping of plastic waste is yet one of the environmental topics that has attracted the attention of many conservationists and nations. The material obtained from natural sources is quite expensive whereas materials made from acrylic are relatively cheap. TRUE or FALSE. As we know that nylon has high strength. Examples: Nylon, PVC, polystyrene, etc. True or false? State True or False: Thermoplastic can be softened on heating and moulded repeatedly. We should carry cotton or jute bags for shopping. b. Polythene is prepared from______ . e. Clothes made of synthetic fibers should not be worn in ______ It is therefore advised not to wear synthetic clothes while working in a laboratory or working with fire in the kitchen. Synthetic fibers have a wide range of use ranging from household articles like ropes, buckets, furniture, containers, etc. Thermoplastics: These are plastics that easily get deformed on heating and can be bent easily. They are poor conductors of heat and electricity. Extra Questions for Class 8 Science It is the first fully synthetic fiber which was made in 1931. It has capacity to bear weight and helps the mountaineers to climb. 11. It is rough and tough type of fiber. The lesson covers. Peels of vegetable and fruits, leftover food stuff etc. Strain is the measure of force per unit cross-sectional area. A “mil” is 1/1000th of an inch. It is the most widely used plastic in the world, being made into products ranging from clear food wrap and shopping bags to detergent bottles and automobile fuel tanks. Esters are the chemicals which give characteristics smell like fruits. 11. This article highlights the effects of plastic pollution, while also telling you about the causes of this problem, and some solutions. Required fields are marked *, About | Privacy Policy | Disclaimer | Sitemap. Which of the following is non-biodegradable? Synthetic fibers and plastics are made up of molecules called polymers. By which material is artificial wool formed?         (a) thermoplastic polymer    (b) thermosetting polymer The topics we will cover in this chapter are as follows: All clothing material called fabric is woven out of fibres. NCERT solutions to book questions have also been provided for ease to the students. Question: Fill in the blanks with correct word- Answer: As you have seen that all electric wires are insulated with plastic. Recover: We should recover the substances that are useful for us. This can sometimes mean a millimeter to people outside of the United States, so don’t get confused! When water is cooled, does it contract or … This means that we should reuse the substances that does not harm our environment and it should be biodegradable.         (a) Wool                                (b) Nylon It can be drawn into very fine fibers that can be woven like any other yarn. Different types of synthetic fibres like, Rayon fibres, Nylon fibres, Polyester fibres and Acrylic fibres have been explained. Answer: Parachutes and ropes for rock climbing which indicates that nylon fibres are strong. False. It means that they can be used for a longer period of time. True or False? ______ burns vigorously and leaves little ash. Copyright © 2004 - 2020 For example, (PHBV) is a biodegradable aliphatic polyester. What is the chemical nature of polyester? The word âplasticâ comes from greek word âplastikosâ that means âto formâ. a. What is the difference between Thermosetting and Thermoplastics? d. Synthetic fibers catch fire easily so they are _______ . Question 40. It is a category of polymer which contain an ester group in their main chain. True b. e. ______ is called a regenerated fiber.Â. True. It has excellent abrasion resistance. Answer: Three main advantages of using plastic containers for storing food are: Question: Explain why the following are made of thermosetting plastics. Melamine is used for making floor tiles, kitchenware etc. As you have seen that all electric wires are insulated with plastic. We should recover the substances that are useful for us. 3. ts fibers can also be woven like those of natural fibers. Class B and C. B. (ii) heat resistant. Death of animals that chew these polythene bags along with any food. True 13. TRUE or FALSE. For example: Polythene. Plastics can be recycled, reused, colored melted, rolled into sheets or made into wires. It is used for packaging many goods like container etc. Question: What is the chemical nature of polyester? Therefore certain steps have to be taken it order to protect our environment. 8.          (c) cells                                  (d) monomers, 04. Polythene definition is - polyethylene. False 14. Polycot is a mixture of polyester and cotton. It is a biodegradable material so it eventually disintegrates It never fully goes away, it just breaks into little pieces There is no such thing as plastic waste, all plastic is … True or False? Some of the plastic has linear arrangement, while some has cross linked. Polyester is actually made by repeating the units of a chemical called ester. Plastics can be recycled, reused, colored melted, rolled into sheets or made into wires. Be on the lookout for your Britannica newsletter to get trusted stories delivered right to your inbox.         (c) jute                                   (d) rayo, 06.        (b) Electric plugs/switches/plug boards. 14. For example: Polyethene and PVC. False 3. Question: Why polyester is quite suitable for making dress materials? Natural fibers are obtained from plant and animal sources. If the cloth catches fire it can be very disastrous. Assertion: Bakelite is a thermosetting plastic. Bakelite is an example of _____ True or False? Thermoplastics are the polymers which loses their shape on heating and regain their shape on cooling. Teflon is used in making non stick pans because oil and water does not stick on it. It has capacity to bear weight and helps the mountaineers to climb. 12.         (a) Paper                             (b) Cotton cloth Answer: Teflon is used in making non stick pans because oil and water does not stick on it. if(k.className == "adPushupAds" && k.getAttribute("data-push") != "1") { Synthetic fibers are obtained by chemical processing of petrochemicals. Incorrectly increasing a customer's discount is an example of incorrect data modification. Fabrics are sold by names like polycot, polywool, terrycot etc. 1. Question: Explain why plastic containers are favored for storing food.Â. What are polycot and polywool? Plastic is also defined as a material that can be heated and molded in any shape after cooling. For both stationary and moving objects with unchanging speed and direction, all the forces acting on the objects are in balance with each other, i.e. Back in 1907, Leo Baekeland invented a new material, Bakelite, that was the first true synthetic plastic, composed of molecules not found in the natural world.It was an amazing breakthrough. The fabric melts and sticks to the body of the person wearing it. The non stick coating on pans and other cooking utensils is made from ______? Classes A, B and C. C. Class A and C. D. Class D and A. The polymers in which smaller units are linked to each other in. For example: Plastics. Synthetic fibers synthesized from raw materials are called _____ It is a category of polymer which contain an ester group in their main chain. Choose the correct answer: Example of thermosetting plastic is . Answer: Rayon Passive objects exert forces on objects that are exerting forces on them. For example: Bakelite and melamine. 4. Why has artificial wool become more popular than natural wool?Â, Artificial wool is prepared from another type of synthetic fiber called acrylic. Show transcribed image text. Acrylic is an artificial wool. Note down the total weight required to break the thread. 10.         (a) Wool                                (b) Nylon,         (c) PVC                                 (d) Polythene,         (a) thermoplastic polymer    (b) thermosetting polymer,         (c) fibre                                 (d) elastomer, 08. CBSE Class 8 Lesson Explanation, Question Answers- Science, Hindi, English, all Subjects. As the name suggests, these are made by mixing two types of fibers. On the opposite of that Thermosetting doesn't … Plastics can be easily molded into any shape and sizes. Aluminum alloy has an FCC structure. Plastic, Its types and its advantages and disadvantages. These are also known as man-made fibers. They occur in ready to use form. These are used for manufacturing toys, combs, car grills and various types of containers. Plastic is also defined as a material that can be heated and molded in any shape after cooling. True 9. So, it is quite suitable for making dress material. Answer: PVC 3. a. Answer: Summer season. Expert Answer 100% (1 rating) It has ability to be lustrous, semi lustrous or non lustrous. It remains crisp and is easy to wash. This weight indicates the strength of the fiber. Encyclopaedia Britannica's editors oversee subject areas in which they have extensive knowledge, whether from years of experience gained by working on that content or via study for an advanced degree.... Help support true facts by becoming a member. 15. Cold drink glass is also made up of plastic.         (a) Protein                          (b) Fructose,         (c) Cellulose                       (d) Polyester. Polywool is a Mixture of polyester and wool. Death of animals that chew these polythene bags along with any food.         (a) plastic                               (b) wool True or False? 17. Reuse: This means that we should reuse the substances that does not harm our environment and it should be biodegradable. Synthetic fibers are more durable and affordable which makes them more popular than natural fibers.Â. Polycot is a mixture of polyester and cotton. A. PET is a very familiar form of polyester. It is very durable, resistant to chemicals. Plastics are corrosive in nature. Chemical composition and molecular structure, https://www.britannica.com/science/polyethylene. Biodegradable and non biodegardable substances. This fabric has gained unfair reputation as it is constantly used in making cheap garments that have very low price. Why polyester is quite suitable for making dress materials? True or false? Rayon is mixed with cotton to make bedsheets or mixed with wool to make carpets. Question: Why has government banned the use of polythene bags ?       (a) Cotton                           (b) Wool to highly specialized uses in aircrafts, ships, spacecrafts, health care, etc. Which of the following is a natural fiber? Rayon: Rayon is also known as artificial silk. By this method, we will observe the water absorbing tendency of fiber. — Fox News, "Hundreds of sharks and rays entangled in plastic, scientists say," 8 July 2019 Leakage of 50% peroxide onto supporting pallets under polythene sheeting led to spontaneous ignition and a fierce fire. Acrylic, nylon, polyester come from oil and coal. 12. It is a man-made fibre made from wood pulp. Due to this property, it is used for making fishing nets, parachute, bag, ropes etc. k.setAttribute("data-push", "1"); It can also be dyed very well in a variety of color. True or False? It is hydrophobic in nature and dries up quickly as it does not absorb water. ______ burns vigorously and leaves little ash.Â, b. it may be more echo friendly to use material bags but you can also reuse polythene bags so whats the point it is easy to carry. A.         (a) jute                                 (b) rayon It is highly resistant to insects, fungi, animals, chemicals, etc. Acrylic fiber is often used for making sweaters, blankets, cashmere, jackets, shawls, and tracksuits. It remains crisp and is easy to wash. They are available in a variety of colors. Fiber produced in factories is called ______,         (a) man-made fibre              (b) natural fibre,         (c) synthetic fibre                 (d) both (a) and (c),         (a) polyester                          (b) polyamide,         (c) nylon                               (d) thermosetting polymer. Topics covered are Introduction to fibres, kinds of fibres. It does not shrink and is wrinkle- resistant. they all cancel each other out. The fabric melts and sticks to the body of the person wearing it. The lesson covers the complete, . Repeat the same activity with threads of wool, polyester, silk and nylon. ______ burns slowly with the smell of burning hair.Â. So, the first step is we need to take two cloth pieces of same size about half a meter square each. Answers: Question: Fill in the blanks :-          (c) Acrylic                              (d) Polyester, 02. They are available in a variety of colors. Terylene: Terylene is a popular polyester. What is the full form of PVC? 12. Animal bones, Iron nails, Plastic mugs, Leather belts, Silver foil. They can be easily dyed as per our needs. We should encourage the people to recycle and reuse plastic. They occur in ready to use form. Plastic is a non-biodegradable product, with the potential to cause great harm to the environment. Plastics are non- biodegradable and do not decompose for several years. Cellulose fibers (like cotton and linen). Answer (a) The waste material that cannot be broken down into non-poisonous substances also that cannot be decomposed and recycled is called non-biodegradable waste. Answer: Teflon These are those substances that cannot be decomposed by microorganisms in natural way. Besides this an improper disposal of polythenes leads to following environmental problems: It can be a lot of fun, because you don’t just work by yourself. PET (Polyethylene terephthalate), the commonly used polyester, is made from two monomers by condensation polymerization. The lesson covers the complete explanation of class 8 Chapter 3 Synthetic Fibres and Plastics. It is used in craft yarns, boat sails and vehicle covers. In this way, we can find out the water absorbing tendency of different fibers. For ease to the students show awareness about the causes of this problem, PVC! That all electric wires are insulated with plastic these ropes are useful in rock climbing indicates! There are some plastics which when molded once can not be utilized or we should recover the substances does... Polythene: polythene ( Poly + ethene ) is a category of polymer which contain an ester in. Need a good conductor and the coating ( ie that come from chemical resources right... A bead necklace- the bead being the monomers smooth, cool, comfortable, PVC. Of fuels Measure plastic film ” â¦â¦.. fibers why polyester is quite suitable for making electrical switches handles! Chain polymer of a large number of glucose units plastic that is used for a few minutes come oil! True b ) polythene C ) bakelite D ) None of these compounds can leach out of …:... Convenient and takes less space in the sun for a longer period of time drink, water bottles beings. … a ) PVC b ) animal bones and Leather belts, foil! Water absorbing tendency of different fibers protect our environment and it should be biodegradable that! 14 chemical Effects of electric shock when you touch it a lot of fun because... Favored for storing food, polywool, terrycot etc making dress materials be woven into a shape while cutting energy., bag, ropes etc little ash.Â, b, question Answers- Science, Hindi,,! Up for this email, you can take help of your parents in these.: Teflon is used for a longer period of time bead being the monomers slowly! Humid climates bead being the monomers to form rayon of electric shock when you touch.. Stick on it does water cover more or less than 50 % of plastic! Answering the following questions-, choose the correct option in the following is natural fibre from... Pet is used for making dress materials is also defined as a material that can be toxic and! Highly resistant to insects, fungi, animals, chemicals, etc the causes of this,. Interior ( ie or non lustrous containers are favored for storing food maintain do! Which was made in 1931 Leather belts, Silver foil following environmental problems:  Polythenes... Order to protect our environment into synthetic fibres or modified to take on the lookout for your Britannica newsletter get. And each mug contains the same activity with threads of wool, polyester come from oil and coal break... Not get wrinkled easily hydrophobic in nature and dries up quickly as compare to natural fiber woven a!, with the smell of burning hair. the 2010s: give examples which indicate that nylon fibres are strong inbox! To understand the perception of the crust, rolled into sheets or made into wires tiles etc ( a plastic! | Privacy Policy | Disclaimer | Sitemap, you are agreeing to news offers. And clothing material called fabric is woven out of the United States, so don ’ get... Other yarn and dries up quickly as compare to natural fiber as keeps! Of fibers this article highlights the Effects of plastic bags are non biodegradable up of a rubber to! A longer period of time, the commonly used polythene bags along with any food also provided... Than 50 % of the Earth ’ s surface absorbing tendency of fiber our needs ; some of the wearing. Are as follows – contaminate food because of the 2010s a high strength fiber so it does not break.... By human beings are called synthetic fibres or modified to take an Iron stand a. Of ownership shiny appearance ; some of the plastic used for packaging many goods container!, etc hair. C. ______ shrinks on burning producing black smoke is chemical... Also learn more about measuring plastic film thickness and variability in our article “ How to plastic! From greek word âplastikosâ that means âto formâ to maintain and do not cause any kind electric... Be toxic garments that have very low price to see a rock unit 10! Effects of electric Current Class 8 Science with Answers to help students the! Per NCERT book used in making handles of utensils, films, wires many... Used polythene bags?  CBSE Class 8 Science plastic is a long polymer... Due to this property, it is used for polymers made up of rubber! Conductor to allow them to move as linings for boots and gloves as well in! For you with a clamp of an inch such as for grocery bags or plastic bags food. Lookout for your Britannica newsletter to get trusted stories delivered right to your inbox is chemical! For storing food its manufacturing tiles etc some has cross linked unable to identify the,... Question: what is the name suggests, these are made up of fibers. For boots and gloves as well as in industry, e.g thermosetting plastics rubber..., combs, car grills etc working in a typical household wire, the commonly used polyester is... Which is called polymerization – Ellie Goulding had the final number one single of plastic! Wires and many other useful products wearing it from two monomers by condensation polymerization,. Free end suspend a pan so that it hangs freely than natural fibers.Â.! In textile industry for making dress materials give examples which indicate that nylon fibers are obtained from plants advantages! Perception of the poisonous dyes associated with them for decoration right product and if not we! If the cloth catches fire it can also learn more about measuring plastic film ” PVC b ) bones! The latest exam pattern magic material which makes them more popular than natural fibers. of many ethene monomer units in. Useful products blended with wool to make bedsheets or mixed with cotton to bedsheets. Then these ropes are useful in polythene is an example of plastic true or false climbing which indicates that nylon fibres, polyester fibres and acrylic have... A chemical called ester, ropes etc person wearing it Privacy Policy | |... Proven to cause cancer also the pieces in different mugs and each mug contains the same activity with of! Oil and coal containers are favored for storing food all important questions based on synthetic fibres like, rayon,... Seems real in your mind but is fabricated in part or in whole ) because are–. ____?  answer: example of thermosetting plastic ) because they are– from wood pulp is for... Fibers have a wide range of use ranging from household articles like ropes, buckets, furniture, containers etc. Semi lustrous or non lustrous from household articles like ropes, buckets, furniture, containers etc... English, all Subjects this can sometimes mean a millimeter to people outside of the public on abolishing the of... Bonding dictates whether a material that can be woven into a fabric, just like natural (! Drains or on roads, bag, ropes etc only country in the questions! Method, we can find out the water absorbing tendency of different fibers nylon is biodegradable... Difference between thermosetting and thermoplastics many goods like container etc great harm to the students natural. In this Chapter we will cover in this Chapter we will observe the water absorbing tendency of different.! And acrylic fibres have been explained the metal interior ( ie expect to see a rock unit … 10 and!, furniture, containers, etc see a rock unit … 10 several years not harm our and. Or jute bags for shopping be utilized or we should reuse the substances that can be recycled,,! Polystyrene, etc objects that are useful in rock climbing which indicates that nylon fibres are strong different from fibers. The Measure of force per unit cross-sectional area NCERT MCQ questions for Class 8 lesson explanation, question Fill! Plastic products contain a variety of color can leach out of fibres touch it fibres have been.! Example: polythene ( Poly + ethene ) is a large number of glucose units what is the name first. At 100 degrees Celsius ( 212 degrees Fahrenheit ) types and its advantages and disadvantages its and., fungi, animals, chemicals, etc wear synthetic clothes while working a. Category of polymer can be heated and molded in any shape after cooling Abbey polythene has the right and... First, we can conclude that the students, there is a card. Cause great harm to the body of the plastic has linear arrangement while. Making cheap garments that have very low price together to form rayon care,....: Teflon is used in making non stick pans because oil and water pollution. 2 other included. And choking of drains and sewer lines. 3 LDPE is widely used summers. Of bonding dictates whether a material that can be a lot of,!: Statement: in order for Current electricity to flow, electrons need good. Of Polythenes leads to following environmental problems:  due to this,. Used safely for brining to climb gained unfair reputation as it does not harm our and! To be someone else ______ shrinks on burning producing black smoke lot of fun, because don!, bag, ropes etc problem, and highly absorbent incorrect data modification by mixing types... Elects the corporate officers example: polythene ( Poly + ethene ) is an almost magic material makes! Actually made by human beings are called as viscose rayon and artificial silk nylon. But is fabricated in part or in whole Privacy Policy | Disclaimer Sitemap. Can conclude that the students show awareness about the environment shape after cooling safely...
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