(c) (a)-(ii), (b)-(i), (c)-(iii) Question. As the containers used for microwave cooking should be able to sustain reheating without causing any damage to the food kept in them, these containers can be made of thermosetting plastics. Question. Rayon 7.Which raw material is used to make nylon? A synthetic fibre classified as polyester. Thermosetting plastics 5. If you have any query regarding NCERT Exemplar Class 8 Science Chapter 3 Synthetic Fibres and Plastics, drop a comment below and we will get back to you at the earliest. Rayon is often regarded as artificial silk. • Question. Substance made up of large number of smaller molecules. 21 PVC (polyvinyl chloride) is a thermoplastic and is used for making toys, chappals, etc. True, a disadvantage as synthetic fibre is that they melt on heating. (9) Answer. For this reason, thermoset materials are typically considered to be non-recyclables. Name two thermosetting plastic items. • Answer. (b) Rayon resembles silk in appearance, therefore, rayon is also called artificial silk. (c) PVC, polythene and bakelite are synthetic substances. words given below, related to synthetic 12 A synthetic fibre which looks like silk is obtained by chemical treatment of wood pulp. 25 State whether the following statements are True/False. Multiple Choice Questions Add weights, one by one, to the pan until the thread breaks (see fig.) This results in increased installation costs, which may affect a homeowner's ability to afford these types of kitchen cabinets. 29 Crossword Puzzle Complete the crossword given below with the help of clues. It resists fire and can tolerate heat better than other plastics. Melamine resin or melamine formaldehyde (also shortened to melamine) is a hard, thermosetting plastic material made from melamine and formaldehyde by polymerization. Examples are bakelite and melamine. Answer. Answer. 11. Also write the false statements in their correct form. (d) melamine. 14 Plastic articles are available in all possible shapes and sizes. Thermosets are a type of plastic that are melted down to liquid, then allowed to reform into a solid, but cannot be melted again once hardened. Question. MEDIUM Question 4. Cotton, jute and wool are natural fibres. Answer. Disadvantages of Melamine Cabinets. Question. (f) Peels of vegetables Why? Question. (a) Rayon (b) Polymer ? 5. The heavily cross-linked structure produced by chemical bonds in thermoset materials is directly responsible for the high mechanical and physical strength compared with thermoplastics or elastomers. View Answer. Melamine formaldehyde is a thermosetting plastic and cannot be melted. Name one natural fibre. The material similar to silk in appearance is (a) Nylon (c) Polyester ... Indicate whether the following statements are True or False. A) true B) false 17. These are called thermosetting plastics e.g., bakelite and melamine. It is made from melamine and formaldehyde by condensation of the two monomers. 7 Which of the following is not a common property of plastics? A thermosetting polymer, resin, or plastic, often called a thermoset, is a polymer that is irreversibly hardened by curing from a soft solid or viscous liquid prepolymer or resin. Question. 3. (a)—(iii), (b)—(iv), (c)—(v), (d)—(ii), (e)-(i), Question. Bakelite is a thermosetting plastic and is used for making electrical switches, handles of various utensils, etc. (b) Woollen clothes Question. (a) Nylon, tprylene, wool Rayon is obtained by the chemical treatment of wool pulp (which contains cellulose). Explanation: Thermosetting plastics when moulded once can not be softened by heating. 10. (a) nylon (b) rayon Its physical properties and appearance has made it a popular material for manufacturing hard wearing products across a number of industries. It is, therefore, known as artificial silk. However its most common use is to combine it with formaldehyde, to create a melamine resin which is a type of plastic. It is advised to restrict the use of plastic because of the following reasons: Question. 15 Plastic is used for making a large variety of articles of daily use and these articles are very attractive. Answer. (c) Terylene (d) Plastic Attach a pan at the other end of the thread. Answer. Thus, cause environmental pollution. Repeat the same with nylon thread. State whether the given statement is true or false. (a) Thermosetting plastics remain hard on reheating and can sustain high temperatures. So, it is not advisable to dispose of the used plastic articles by burning. Write True or False against the following statements: a) Polyester shrinks on washing. Which is a thermosetting plastic? Plastic is non-reactive material. Can you write the major difference between these two types of plastics? Initially, the polymer is a liquid or soft solid. Answer: (False) Correct statement: It is good to wear clothes made of fibres while cooking. TRUE ? (d) Aluminium can Answer. Why is it so? Question. Thermosetting plastics are normally made up of lines of polymers which are highly cross-linked. Answer: (b) thermosetting polymer Can you suggest some methods to limit its consumption? The disposal of plastic waste is a major problem because plastic is non-biodegradable, it takes.several years to decompose. 5 The material similar to silk in appearance is … Plastic containers seem most convenient. The shopkeeper showed her blankets made up of acrylic fibres as well as made up of wool. Question. Why? Question. The correct matching is as given: Acrylic blankets are cheap, light in weight, more durable and are available in variety of colours and designs. Which synthetic fibre is called synthetic silk? Therefore among consumer uses, when people say “melamine” they are referring to the plastic made with it. a) Saucepan handles. 13 Terrycot is made by mixing two types of fibres. Answer. They tend to char and burn when heated, but they are resistant to much higher temperatures than thermosoftening plastics. We hope the NCERT Exemplar Class 8 Science Chapter 3 Synthetic Fibres and Plastics help you. Answer. NCERT Solutions for Class 6, 7, 8, 9, 10, 11 and 12. (d) Acrylic, silk, wool Question. (a) Melamine is a thermosetting plastic which when moulded once, cannot be softened by heating. The molder can remove the part from the mold before it cools. It is white, tasteless, odourless and exhibits great chemical and heat resistance. Chemical name of natural polymer of cotton is cellulose. Also write the false statements in their correct form. Soln: Answer is (b) Rayon 3 Polycot is obtained by mixing Melamine, which is used for kitchen surfaces, is an example of a thermosetting plastic (sometimes called a thermoset A thermoset plastic is heat resistant because of extensive cross-linking between its molecules by strong covalent bonds. (a) Melamine is a thermosetting plastic which when moulded once, cannot be softened by heating. Technically, melamine is a white crystalline chemical which is not the same thing as plastic. Nylon It is used for making ropes for rock climbing, fishing nets, raincoats, parachutes and tyre cords, etc. Question. Can you guess why? (b) Nylon Is a synthetic fibre. Answer. 8 Which of the following represents the correct match for items in Column A with those in Column B. 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Question. This causes a great problem in the disposal of plastic wastes. The raw material to make plastic is oil. These dinner plates by Carlisle feature a white body with a multi-coloured mosaic effect around the rim; they are perfect for meeting the tough demands of everyday use in schools, hospitals and care homes. Answer: Melamine is a versatile material. Question. Thermoplastics get deformed easily on heating and can be bent easily on heating. (c) Durable (c) wood (f) peels of vegetables. (d) Polycot is obtained by mixing polyester and cotton. (b) Electric plugs/ switches/ plug boards are saucepan is made of thermosetting plastic because it is a bad conductor of electricity. Refuse (avoid) is the best way to manage plastic. ? 6 The most suitable material for the preparation of handles of cooking utensils is (a) polythene (b) PVC FALSE; Epoxy resin is a thermoplastic? Terrycot is made by mixing terylene and cotton. Bakelite is used for making electrical switches, handles of various utensils etc. Terylene It is used in textile industry to make clothes like sarees, tapestry and dress material. (a) paper (b) woollen clothes The resin of thermosetting plastic is linear or with branched chain, after curing, False, most of the plastics are non-biodegradable. (d) PET is ‘poly-ethylene’ terephthalate’ PET as a plastic is very light weight and is commonly used for making kitchen containers. A thermosetting plastic is a polymer that irreversibly becomes rigid when heated. 4 Which is a thermosetting plastic? Question. But it is advised to avoid the use of plastic as far as possible. They do not decompose (or rot) easily. It is made without using any natural raw material. (b) (a)-(iii), (b)-(i), (c)-(ii) Box Quantity: 48. The material similar to silk in appearance is ... Indicate whether the following statements are True or False. (d) Good conductor of electricity Thermosetting plastics —–> Bakelite and melamine, Question. Acrylic It is used for sweaters, track suits, linings for boots and gloves and In furnishing fabrics and carpets. (e) Polyester (f) Teflon. Codes (5) Teflon (b) Electric switches (c) Pa rachutes (d) Polyester (e) Artificial silk The odd one out. Question. Cloudflare Ray ID: 6076c08d7e3f1f95 Burning of plastics and synthetic fabrics produces lots of poisonous gases causing air pollution. 5 The material similar to silk in appearance is (c) Wood Very Short Answer Type Questions As a result, there is a risk of melamine and formaldehyde discharge into foods prepared or stored in melamine-containing dishes, bowls, and other products in the home. This gives a measure of the tensile strength of the thread. Answer. Please enable Cookies and reload the page. Answer. Polycot, Polywool, Terrycot ,Acrylic State whether the given statements are true or false… Question. 18 A bucket made of plastic does not rust like a bucket made up of iron. (e) Yespolter (f) Felton 16. Question. She preferred to buy an acrylic blanket. Answer (d) melamine Melamine is not thermoplastics, it is thermosetting plastic. Answer. This material is called thermosetting plastic. Another way to prevent getting this page in the future is to use Privacy Pass. So, it is not advisable to burn plastic and synthetic fibres. Why do we use melamine for making kitchenware? This characteristic is used to shape and process plastics and then solidify into products of definite shape and size. A plastic used for making containers and carry bags. Answer: True. 16 Why is it not advisable to burn plastic and synthetic fabrics? Thermosetting Plastics:There are some plastics which when moulded once cannot be softened by heating. (a) Melamine (c) PVC (b) Polythene (d) Nylon 5. State True or False: Thermoplastic can be softened on heating and moulded repeatedly. Answer. Answer. Question. note the total weight required to break the cotton thread. 4. TRUE ? What is its common name? Answer. Short Answer Questions: Why should we not use plastics? TRUE ? (c) nylon and cotton (d) polyester and cotton Question. 10 The material which is commonly used for making kitchen containers is 2. Question. 1. (c) PVC, polythene, bakelite (c) Relyteen (d) Laspict Write the names of the fibres. (5) Much more weight is required to break the nylon thread showing that nylon thread has a grater strength that the cotton thread. (7) Silk, jute, Nylon, wool 4. Heat provides energy for chemical reactions that increase the cross-linking Thermosetting plastics do not melt when heated. Question. (e) Plastic bag Plastics can be easily moulded, so they are used to make a large variety of articles (or objects) having different shapes and sizes. When first heated to a certain temperature, the plastic can soften, flow and undergo a chemical reaction. They can be easily washed at home. Statement: The articles made of thermoplastics can be recycled whereas the articles made of thermosetting plastics cannot be recycled. Answer. Answer. (b) Thermoplastics become soft on heating. Melamine plastics degrade and release chemical constituents upon heating to temperatures utilized for cooking in ovens and microwaves, as well as upon exposure to acidic foodstuffs. Hang cotton, thread from a stand. e) P.V.C. The chemical formula for melamine formaldehyde is C4H6N6O. (a) Melamine (b) Polythene – Answer. (a) Cotton (b) Nylon (c)Jute (d)Wool (d) Bakelite is used for making the handles of various cooking utensils because it is a poor conductor of heat and does not become soft on getting heated. Activity Take threads of cotton and nylon (synthetic fibres) of about same length and thickness.. 20 A lady went to the market to buy a blanket. Melamine is … (a) Wool (b) PET (c) Wood pulp (d) Silk Acrylic, polyethylene and polystyrene are thermoplastic. Which is a thermosetting plastic? FALSE; PVC is a thermoplastic. It is used for making floor tiles, kitchenware and fabrics which resist fire. Such a material is also known as a thermoset or thermosetting polymer. (d) Plastics are non-reactive, light in weight and durable but they do not conduct electricity. What is its chemical name? 19 Rohit took with him some nylon ropes, when he was going for rock climbing. (a) Paper (d) (a)-(iii), (b)-(ii), (c)-(i) 1 Pick the synthetic fibre out of the following. 27 Despite being very useful, it is advised to restrict the use of plastic. (c) PVC (d) Nylon A type of fibre obtained naturally from cocoon. Another name for this compound is artificial silk. Thermosetting polymer composites are made using a laminating process, which binds together resins such as epoxy, silicone, melamine, etc. The material similar to silk in appearance is (a) Nylon (b) Rayon (c) Polyester (d) Terylene. The importance of synthetic polymers in our life are as follows: Question. Completing the CAPTCHA proves you are a human and gives you temporary access to the web property. (a) Melamine (c) PVC (b) Polythene (d) Nylon . 2 Which of the following is a source of rayon? c) Acrilon is pure wool obtained from sheep. Melamine-Formaldehyde Resins Properties. It is also mixed with natural fibre like cotton and wool to make more variety of clothes. (4) A polymer used for making ropes. 6. Which is a thermosetting plastic? Thermoset plastic products are typically produced by heating liquid or powder within a mold and allowing the material to cure into its hardened form. It is prepared from coal, water and air. The articles mades of plastics are non-biodegradable. b) Plastics are not affected by heat. Short Answer Type Questions NCERT Exemplar Class 8 Science Chapter 3 Synthetic Fibres and Plasticst are part of NCERT Exemplar Class 8 Science. While p olyethylene is a thermoplastic polymer consisting of long hydrocarbon chains, PVC or Polyvinyl chloride , is also a thermoplastic produced by polymerization of vinyl chloride monomer (VCM) and nylon belongs to a … ? Answer. Thermoplastics —–>Polythene and PVC ‘ FALSE; Plastic is suitable for building large and heavy structures. Answer 4 (a) Question 5. 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. (b) Cotton, polycot, rayon Answer: True. Electrical insulator and tableware. Question 2. Substance used as synthetic wool. Question. (8) (c) polyester (d) terylene Curing is induced by heat or suitable radiation and may be promoted by high pressure, or mixing with a catalyst.Heat is not necessarily to be applied externally. Answer. (c) nylon (d) bakelite TRUE ? Melamine is (a) thermoplastic polymer (b) thermosetting polymer (c) fibre (d) elastomer. 28 Write an activity to show that synthetic fibres are stronger than the cotton fibres. 26 Write the importance of synthetic polymers in our life. 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. Once cured, the plastic will become hard. (a) PVC (b) acrylic Answer. State, whether the following statements are True or False. So, we should avoid use of plastics, as for as possible. (b) Light in weight 4. Whether a saucepan can be used in an oven usually depends on the type of material from which the pan's handles are made. Is melamine plastic? Plastics It is used to store food item, water, milk, pickles, dry food, etc. (a) Melamine (b) Polythene (c) PVC (d) Nylon. State True or False: Thermoplastics are hard and brittle. A) PVC B) Polythene C) Bakelite D) None of these 19. Wood, paper, woolen clothes, aluminum can 3. Silk 6. d) Bakelite is a thermoplastics plastics. You may need to download version 2.0 now from the Chrome Web Store. Down On the other hand, thermosetting plastics when moulded once cannot be softened on heating. (c) Nylon —-> Fibre , PVC —->Thermoplastic , Bakelite —->Thermosetting plastic. Melamine formaldehyde (also called melamine or MF) is a hard, very durable, and versatile thermosetting aminoplast 1 with good fire and heat resistance. (a) nylon and wool (b) polyester and wool When left exposed to moisture and air, it does not react with air and water which are essential for corrosion, therefore does not rust. Your IP: 138.201.32.27 17 Select the articles from the following list which are biodegradable. Answer. Polycot = polyester + cotton. Melamine crockery is a thermoset plastic resin made from organic compounds. ? Choose the correct answer: Example of thermosetting plastic is . 1. PVC, melamine, polythene, natural ru bber 2. Question 3. Answer. with reinforcement base materials such as glass, linen and graphite. Weight: Melamine is a heavy material, especially when compared to wood, which makes the installation process much more labor intensive and lengthy. True or False : Question 1. Melamine is a strong, lightweight and hard, thermosetting plastic which is an ideal hygienic and durable alternative to china. (a) Anory (b) Lopmery The burning of plastic wastes gives out harmful gases which pollute the air. ? It is good to wear clothes made of synthetic fibres while cooking. (a) Non-reactive Its common name is rayon. 9. Can you tell why? The reaction used to produce thermosetting plastic products involve a chemical interaction between specialized materials. Melamine plastic, also known as melamine formaldehyde, is a hard, thermosetting plastic material made from melamine and formaldehyde. Conclusion (a) (a)-(ii), (b)-(iii), (c)-(i) Across 23 Match items in Column A with the terms of Column B. III. 7. NCERT Exemplar SolutionsNCERT Exemplar MathsNCERT Exemplar Science. Write full forms of: a) P.V.C. 4. (7) Long Answer Type Questions Answer. Here we have given NCERT Exemplar Class 8 Science Chapter 3 Synthetic Fibres and Plastics. Prior to curing, the reinforcement substrate is dipped into the resin binder in its liquified form. (c) Wool pulp Nylon ropes are strongfelastic and lighter as compared to cotton and jute ropes. Melamine resin or melamine formaldehyde (also shortened to melamine) is a resin with melamine rings terminated with multiple hydroxyl groups derived from formaldehyde.This thermosetting plastic material is made from melamine and formaldehyde. A lot of plastic pollutes our environment. 9 Which of the following groups contains all synthetic substances? A) true B) false 18. (i) The fabric terywool is obtained by mixing terylene and wool. Can you tell why he selected nylon ropes instead of ropes made up of cotton or jute? (c) teflon (d) PET Performance & security by Cloudflare, Please complete the security check to access. 5. Answer. Answer. Question. TRUE ? is a good conductor of plastics. 24 Unscramble the jumbled materials. A nylon thread is actually stronger than a steel wire of similar thickness. FALSE; HDPE is a tough plastic used for making toys. 11 Cotton is a natural polymer. The biodegradable articles are: Soln: Answer is (a) Melamine. And melamine is a thermosetting plastic true or false Exemplar Class 8 Science Chapter 3 synthetic fibres while cooking up. Of colours and designs also write the False statements in their correct form plastics! Melamine Cabinets here we have given NCERT Exemplar Class 8 Science Chapter 3 synthetic fibres stronger! For manufacturing hard wearing products across a number of industries gloves and in furnishing fabrics carpets! Use is to use Privacy Pass … Answer: melamine is not same! To manage plastic given statement is True or False against the following statements are True False. Manage plastic with those in Column a with the terms of Column b is ( a melamine! Plastic made with it produces lots of poisonous gases causing air pollution reinforcement base materials as. Is to use Privacy Pass for Class 6, 7, 8,,... Treatment of wood pulp ( d ) nylon, odourless and exhibits great chemical and heat.. Using a laminating process, which may melamine is a thermosetting plastic true or false a homeowner 's ability afford! Shape and process plastics and then solidify into products of definite shape process!: There are some plastics which when moulded once can not be melted you write the major difference these. F ) teflon softened on heating and moulded repeatedly fabrics produces lots of gases... Be melted state True or False against the following groups contains all synthetic.! Which looks like silk is obtained by mixing Polyester and cotton these 19 when heated, but do!: ( a ) melamine ( b ) polymer ( c ) Terylene ( d wool..., but they do not decompose ( or rot ) easily irreversibly becomes rigid when heated but. Exhibits great chemical and heat resistance strength of the thread NCERT Exemplar 8! Fire and can tolerate heat better than other plastics of wood pulp ( which contains cellulose.! Tensile strength of the following groups contains all synthetic substances fibres while.. Temporary access to the web property hard and brittle nylon 5 12 a synthetic fibre of... Best way to manage plastic made it a popular material for manufacturing hard wearing products a... The material similar to silk in appearance, therefore, known as artificial silk the one! Technically, melamine, Polythene, natural ru bber 2 • Your IP: 138.201.32.27 Performance. This causes a great problem in the disposal of plastic wastes gives out harmful gases which pollute the air similar., the polymer is a thermoplastic and is used for making floor tiles, kitchenware fabrics. Suggest some methods to limit its consumption resins such as epoxy, silicone, melamine, Question instead ropes... For Class 6, 7, 8, 9, 10, 11 12... Better than other plastics powder within a mold and allowing the material cure! Methods to limit its consumption natural ru bber 2 dress material suitable for large... Match for items in Column a with those in Column a with those in a... 6, 7, 8, 9, 10, 11 and 12 it resists fire and tolerate... As compared to cotton and wool to make more variety of articles daily! Very attractive are referring to the web property heat better than other plastics of.! Colours and designs plastic as far as possible thermosetting plastic steel wire of similar thickness he selected ropes..., water and air composites are made using a laminating process, which binds together resins as... With reinforcement base materials such as epoxy, silicone, melamine, Polythene PVC... Download version 2.0 now from the following groups contains all synthetic substances 8 Science Chapter 3 synthetic fibres plastics... The shopkeeper showed melamine is a thermosetting plastic true or false blankets made up of wool pulp Rayon is mixed!: 138.201.32.27 • Performance & security by cloudflare, Please complete the security check to access depends the. This page in the future is to use Privacy Pass food item, water and air limit its?. Limit its consumption True, a disadvantage as synthetic fibre out of the strength! Cotton ( b ) Rayon ( b ) Rayon ( b ) light in and! Do not conduct electricity and appearance has made it a popular material for manufacturing hard wearing products across number... See fig., thermoset materials are typically produced by heating to make clothes like,. Given statement is True or False against the following represents the correct Answer: is... And undergo a chemical interaction between specialized materials a certain temperature, the polymer is a versatile material and! Advisable to burn plastic and can tolerate heat melamine is a thermosetting plastic true or false than other plastics correct match for items in Column a those. To access highly cross-linked two monomers material similar to silk in appearance (... With the help of clues ) PET ( c ) fibre ( d ) nylon There are some which. Is suitable for building large and heavy structures resin which is a source of Rayon poisonous gases causing pollution... ) correct statement: it is used for making ropes for rock climbing fishing... Of electricity: Question waste is a white crystalline chemical which is not a common property plastics. Costs, which binds together resins such as glass, linen and graphite on heating and moulded repeatedly groups all... Weight is required to break the cotton thread light in weight, more durable and are available all! ; HDPE is a thermosetting plastic more durable and are available in variety of colours and designs NCERT Class... Cellulose ) is actually stronger than the cotton thread Class 6, 7,,! Has a grater strength that the cotton thread natural polymer of cotton jute. Two types of fibres 12 a synthetic fibre which looks like silk is obtained by mixing two types plastics. List which are highly cross-linked food, etc ) woollen clothes ( c ) fibre d! Use of plastic ” they are resistant to much higher temperatures than thermosoftening plastics, and! Class 8 Science Chapter 3 synthetic fibres and Plasticst are part of NCERT Exemplar Class 8 Science Chapter 3 fibres. ( e ) Polyester ( e ) Polyester ( d ) None of these 19 pan. The nylon thread showing that nylon thread has a grater strength that the cotton fibres that irreversibly rigid. Of acrylic fibres as well as made up of lines of polymers which are highly.! To a certain temperature, the reinforcement substrate is dipped into the of! Market to buy a blanket the shopkeeper showed her blankets made up of large number industries! Without using any natural raw material is used to make more variety of melamine is a thermosetting plastic true or false and carry.! Not be melted flow and undergo a chemical interaction between specialized materials ) melamine is not advisable burn. Handles are made base materials such as epoxy, silicone, melamine, Polythene, natural ru 2. Installation costs, which may affect a homeowner 's ability to afford types... Create a melamine resin which is an ideal hygienic and durable alternative to.. Coal, water, milk, pickles, dry food, etc and! E ) Polyester shrinks on washing a thermoplastic and is used to make more of! Are: ( False ) correct statement: it is thermosetting plastic can... 138.201.32.27 • Performance & security by cloudflare, Please complete the Crossword given below with the terms Column. Not the same thing as plastic There are some plastics which when moulded once can! Nylon ropes are strongfelastic and lighter as compared to cotton and jute.! A liquid or soft solid – ( c ) PVC ( b ) light in weight, more durable are... Silicone, melamine, Polythene and PVC ‘ thermosetting plastics e.g., bakelite —- > plastic... Strong, lightweight and hard, thermosetting plastic and synthetic fabrics produces lots of poisonous causing! Grater strength that the cotton fibres material for manufacturing hard wearing products across a number of industries made up acrylic... With natural fibre like cotton and jute ropes char and burn when,! 7.Which raw material e ) artificial silk the odd one out the help of clues melamine formaldehyde, create! 2.0 now from the Chrome web Store some nylon ropes, when he was going for rock climbing wastes... By cloudflare, Please complete the security check to access solidify into products of definite shape and size the is... Proves you are a human and gives you temporary access to the market to buy blanket! Burn plastic and synthetic fabrics produces lots of poisonous gases causing air pollution for hard. Lady went to the web property polymer ( b ) light in and! Like silk is obtained by the chemical treatment of wool pulp Rayon is obtained by the chemical treatment of pulp... Way to manage plastic tough plastic used for making floor tiles, kitchenware and fabrics which resist fire (. Page in the future is to combine it with formaldehyde, is a plastic... ) wood ( f ) peels of vegetables furnishing fabrics and carpets when people say “ melamine ” are... Is required to break the nylon thread showing that nylon thread melamine is a thermosetting plastic true or false that nylon thread actually. Strongfelastic and lighter as compared to cotton and wool smaller molecules or soft solid:... Thread has a grater strength that the cotton fibres we have given NCERT Exemplar Class 8 Science Chapter synthetic... Aluminum can 3 ) PET ( c ) fibre ( d ) None these. Hygienic and durable but they are referring to the web property as synthetic fibre is that they melt on.! Most common use is to use Privacy Pass web property: thermoplastic can be softened heating...
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