uses of melamine class 8

It is therefore advised not to wear synthetic clothes while working in a laboratory or working with fire in the kitchen. (a) protein True If you wish to know more about fibres and plastics and the products made from them, you may explore the following website: 2. Synthetic fibres shrink a lot when washed. Answer: (d) Silk, Question 6. Plastics can be moulded to any shape. 7. Answer: Answer. (c) PVC Melamine is also used as fire retardant additives in paints, paper and plastics. Nylon is used in toothbrushes, combs, etc. In which year was nylon made? Write some advantages of synthetic fibres. Question 3. 9. Nylon, Question 20. —–synthetic——-fibre on burning, smells like burning paper. Artificial silk is another name for silk. (c) What value of Piku is shown here? Question 13. 20. Question 1. One of the biggest Melamine supplier in India is KPL international limited which is established about two decades ago. Answer: Write uses of melamine plas... chemistry. Question 1. Examples: bakelite and melamine Characteristics of plastics → They are non-reactive. Its help you to complete your homework. (a) 1931 False Name some objects made of plastics. (d) none of these, Question 19. In which country was rayon first time synthesised? 10. The use of plastics can be reduced by using bags made of—jute—-or—paper—- instead of polythene bags. Nylon was made in 1931. (h), IV. Riya’s father got a transfer to another place. She preferred to buy an acrylic blanket. (b) wrinkle free 4. While sorting out the things Riya found many of her clothes of various fabrics were not fitting her or worn-out. Polymers Some uses for melamine are whiteboards, floor tiles, kitchenware, fire retardant fabrics, and commercial filters. Answer: Can you guess why? Share 3. Observe both the beakers after one or two months. (a) They can then debate on the topic ‘My Fabric is Superior’. If these plastics are swallowed by the innocent animals along with their food, they harm their di-gestive system which leads to their death. (a) Terrywool Protein. (a) Describe about nylon. 10. (b) Cotton Answer: Question 10. Related Questions to study. (b) melamine (c) Polyvinyl Chloride. Synthetic Fibres and Plastics Class 8 Extra Questions Long Answer Questions. 5. 3. Choose the correct option. (d) All of these, Question 15. Answer: Activities and Projects 5. Answer: Class – 8. Question 1. Terrywool: It is made by blending polyester and wool. (d) Melamine is also used as a fertilizer due to its high nitrogen contents; however, it is much costlier to produce than other nitrogen fertilizers like urea. Organise a debate in the school. (c) cells By regenerating them from natural fibres, like in rayon. Polymers are compounds that are made up of same, small repeating units, joined together through bonds in a linear pattern. Melamine cannot be melted for recycling like other plastics. What is ester? 3. Raw materials for preparation of synthetic fibres are obtained from substances like ____________, ____________ and ____________. (d) rayon, Question 13. Answer: Answer: (d) Fill in the Blanks Question 14. 4. Common variety of polyester is (b) Which fibre is used as artificial wool? Question 2. Sulfonated melamine formaldehyde is used as a cement admixture to increase the fluidity and workability of the mixture while reducing the water content in the mixture during its handling and pouring. It resists fire and can tolerate heat better than other plastics. (a) Polythene and polyvinyl chloride. 19. 8. Melamine is a versatile material. Looks and feels like fine porcelain and ceramic It is used to make apparels like shirts, blouses, etc. They do not get heated up like metals. When combined with cyanuric acid, which may also be present in melamine powder, melamine can form crystals that can give rise to kidney stones. Terrywool is made by blending polyester and silk. It is fully synthetic polymer which is prepared from coal, water and air. Polycarbonate is used to make Its uses include whiteboards, floor tiles, kitchenware, fire retardant fabrics and commercial filters. 4R’s stands for Redue, Reuse, Recycle and Recover. Plastics are non-biodegradable, i.e., they do not get decomposed by microorganisms. Some of them are as follows: Question 3. 3. Melamine is also used as a fertilizer due to its high nitrogen contents; however, it is much costlier to produce than other nitrogen fertilizers like urea. It is a polymer of amides. Though it is in very small amount but continuous use of it is exposing our body to harmful and poisonous chemicals. What nature of plastics makes them a good storage containers for most of the articles? Answer: Answer: Melamine is categorized under Class #7 on the list of Plastic Resin Codes. (j) Advantages of synthetic fibres are: Question 9. (d) Wood, Question 3. Answer: Melamine is a versatile material. Which of the following are made from thermosetting plastic? 7. Answer: The major problems due to plastics are: Question 8. (b), II. Question 15. Answer: (d) Why synthetic clothes are famous than natural fabrics? Melamine foam is a special form of melamine resin. Melamine can also be used as a pesticide, It forms a major component in pigment yellow 150, which is a colorant in plastics and inks, melamine is also used as a super plasticizer to make high resistant concrete. Answer: What is polythene? (d) none of these, Question 4. Raw materials for preparation of synthetic fibres are Give some examples of thermoplastics. Polyester is the strongest synthetic fibre. If the cloth catches fire it can be very disastrous. Acrylic resembles ____________. 7. Answer: Answer: Finding your suitable readers for nicole miller home dynasty melamine appetizer plates is not easy. Piku is very fond of art and craft. Answer: 8. (b) Melamine and its salts are used as fire-retardant additives in paints, plastics, and paper. 4. (a) terylene Synthetic fibres has many advantages as compared to natural fibres. True or False We should use a special garbage bins to dispose plastic wastes. 6. rayon Name some artificial fibres. Question 2. The lesson covers the complete explanation of class 8 Chapter 3 Synthetic Fibres and Plastics.Topics covered are Introduction to fibres, kinds of fibres. Question 3. Do it yourself. If there is none, form one. Polyester could be blended with natural fibres to enhance its properties. Dear Student, Please refer the answer given by Nitesh. Answer: 6. (d) Answer: True Melamine is also used as fire retardant additives in paints, paper and plastics. Synthetic fibres do not absorb much ____________. Board – CBSE. Do it yourself. Special plastic cookware made of melamine is used in microwave ovens for cooking food. CLH report Proposal for Harmonised Classification and Labelling Based on Regulation (EC) No 1272/2008 (CLP Regulation), Annex VI, Part 2 International Chemical Identification: 1,3 Answer: Polythene is a polymer of ethene. The shopkeeper showed her blankets made of acrylic fibres as well as made of wool. Plastics are non-biodegradable in nature. (b) The reason i ask is i built a melamine enclosure for one of my BCC's and recently, she urinated ALOT while i was asleep and i didnt get around to cleaning it until i came home from class and running errands (roughly 8-10 hours later) and the area where she urinated seems to have "cracked" and now the wood underneath has soaked up a bit of moisture and expanded substantially. It is used for making floor tiles, kitchenware and fabrics which resist fire. The government should ban the use of plastic bags. The property of materials by which they can be moulded into any shape is called If plastics are burnt, they evolve poisonous gases. 5. Take some organic waste (like peels of fruits, vegetables) in a beaker and some plastic waste materials in other beaker. So they are available in all possible shapes and sizes. Share with your friends. Question 1. Synthetic Fibres and Plastics Class 8 Science Chapter 3 as per NCERT Book used in CBSE and other Schools. Question 4. Melamine is rich in nitrogen, a property that is similar to protein. (d) 1950, Question 7. (c) Silk Give the name of a plastic used for making fibres. Answer: (b) Silk (i) Question 3. They make versatile materials but are very dangerous to the environment. Nylon is used in combs and toothbrushes. The material which is commonly used for making kitchen containers is : MEDIUM. 6. Rayon is the first man-made cellulose fibre. Furthermore, some filters are made out of porous melamine. 11. Answer: It is used for making floor tiles,unbreakable kitchenware,ashtray and fire resistant fabric. Answer: 10. cellulose, starch What is its chemical name? (a) bakelite (b) thermoplastics What is plasticity? Which of the following polyester is made by blending polyester and cotton? Melamine was initially found in food stuffs exported to the USA in early 2007 contained in contaminated wheat gluten and rice protein and had resulted in the death of several pet dogs and cats. Answer: A lady went to the market to buy a blanket. Write some properties and uses of melamine. It is used to make socks and stockings as it is elastic. A melamine fibre, Basofil, has low thermal conductivity, excellent flame resistance and is self-extinguishing; this makes it useful for flame-resistant protective clothing, either alone or as a blend with other fibres. Name the largest producer unit of rayon in the world. False (b) petroleum 5. Grasim India, Question 8. Wood pulp is used to make (c) viscose Nylon Terrysilk: It is made by blending polyester iaiid silk. (b) straws US $310.00-$435.00 / Cubic Meter. (d) (a) durable Here you get easy solutions of Lakhmir Singh and Manjit Kaur Science solution Chapter 3 . it is used for coating the outer surface of the utensils so that they do not catch fire and no damage occurs. They absorb less water and are quick to dry. Answer: (b) How can we reuse any plastic items? 9. What is cellulose? 4. Though storing and carrying food in plastic container is more efficient. Visit five families in your neighbourhood and enquire about the kind of clothes they use, the reason for their choice and advantages of using them in terms of cost, durability and maintenance. (b) elasticity TCC’s Melamine is an organic compound that is often combined with formaldehyde to produce melamine resin, a synthetic polymer that is fire resistant and heat tolerant. (c) Polyester (e) Riya is ignorant and non-ecofriendly whereas Shweta is insightful and eco-friendly. Bakelite and melamine. List the strategies for plastic waste management. 17. Melamine is an organic compound which on combining with formaldehyde forms a very durable thermosetting plastic. (c) 1948 Answer: It was used as a supplement of silk when silk got deficient during World War II for many military applications. Answer: (a) coal 2. Question 12. (c) Piku is sensible, creative, responsible to nature, mature and eco-friendly. Question 16. Write the advantages of synthetic fibres. False (b) cross-linked arrangement of units in plastic. 10. Synthetic fibres are Write its uses and properties. Write some properties and uses of melamine. 2. Answer: (c) PVC Fill in the blanks with suitable word/s. Is using plastics for storing food safe? Melamine is a name used both for the chemical and for the plastic made from it. Polymers are made up of small units called (a) 2. NCERT Solutions for Class 6, 7, 8, 9, 10, 11 and 12, Question 1. There are certain governmental and non-governmental organisations who educate the general public on how to make wise use of plastics and develop environment friendly habits. Cellulose is a polymer made up of large number of glucose units. It is used to make parachutes, tents, ropes, etc. Which of the following is natural fibre? Electric wires are coated with—PVC——. 7. What is 4R’s? Nylon. State whether the given statements are true or false. Melamine is sometimes added to food products to illegally increase the apparent protein content. What are the uses of polyester? Melamine can be manufactured from (a) No, it is not at all practical to say completely ‘NO’ to plastics because nowadays plastics are insepa-rable part of our daily life. 12. 10. melamine is a thermosetting plastic and does not melts down on heating. 14. Answer: (b) Melamine 11. What are polymers? It is used in making home furnishings and apparels. Answer: Answer: Question 15. England, Question 6. 12. Rayon synthesised for the first time in ____________. Here we give Chapter 3 all solution of Class 8. Answer: False Nylon, terylene, PET, acrylic, teflon, etc. Answer: ‘Plastics are hazard to environment’. Terylene. 2. 8. These gases destroys the ozone layer of the earth and also pollute the environment. (e) What values of Riya and Shweta are shown here? (b) wool Your email address will not be published. 14. False This shows that organic waste are biodegradable whereas plastics are non-biodegradable. Answer: (d) Non-biodegradable, Question 20. They are very useful for saving our trees and animals as they are made up of chemicals. They are cheaper in cost as compared to natural fibres. Why is it advised not to wear synthetic clothes while working in a laboratory or working with fire in the kitchen? Plastics are those substances which are mostly synthetic in nature. Name a synthetic fibre which is polyamide. 9. Afterwards, this plastic is added to a paper base to form a laminate that covers a variety of household objects and other materials. The uses of melamine clean energy mini-grids also plays the vital role of energy … (d) Answer: Which fibre is known as artificial silk? Give some examples of thermosetting plastics. (d) Nylon, Question 9. Answer: 11. The synthetic fibres melt on heating. List the two ways in which synthetic fibres can be synthesised. → They are poor conductors of heat and electricity. We should not throw plastic wastes in water bodies. 13. Use of plastics Practicing 4R’s principle, i.e., Reuse, Recycle, Reduce and Recover should be encouraged. 13. wool Match the following 1. Answer: We should use paper bags and jute bags instead of using plastic bags. 3. Jammu & Kashmir has banned the use of plastic bags. 143 Qs. Q Squared's restaurant-grade melamine can withstand the rigors of everyday use and is also more resistant to scratch marks and use and abuse over time. Question 10. (d) all of these, Question 18. Magic erasers are a powerful cleaning tool that you can use to remove stubborn marks from hard surfaces all around your house. KPL International Limited is an arm of Kanoria Chemicals & Industries Limited (KCI), which is a very diversified company with OHSAS 18001, ISO 14001 and ISO 9001 certification. Melamine pyrophosphate like dimelamine phosphate 27 gives about 15% of thermostable char. Plastics are non-reactive. 1. Question 2. Bakelite is a Polymer made up of the Monomers Phenol and Formaldehyde. However, similar behaviour with a more thermostable residue is shown by melamine cyanurate. Thereafter, this contamination was found in many other products that use protein content as … Multiple Choice Questions (MCQs) 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. She donated these in a charity. Following are the properties of plastics: Question 5. Synthetic fibres are moth and insect resistant. Devise an activity to show that organic waste is biodegradable while plastic is not. Draw a diagram to show the: It is used to make furnishings and upholstery. But chemicals used for manu-facturing plastics leeches out into the food and contaminates it. (b) polymer Melamine resin makes it very durable and shatter-resistant, making melamine products more desirable than other plastic housewares. (c) plasticity (e) Cotton is a natural polymer. Polyester is used for finishing on guitars and pianos. Cover the wastes in both the beakers with soil. It contains 67% nitrogen and has fire retardant properties when mixed with resins due to the release of the nitrogen gas while burning. (a) Bakelite If use of plastics are not reduced, our earth would turn into a big garbage bin. PHYSICAL PROPERTIES OF MELAMINE Page in Marketizer.com - The World's Leading Industrial Portal, offering Business Tools and Information. http:/ /www.pslc.ws/macrog/index.htm (a) Electrical conductors (c) Terrysilk In this article, we make a short list of the best readers for nicole miller home dynasty melamine appetizer plates including detail information and customer reviews. Synthetic fibres ____________ on heating. Answer: Which of the following is synthetic fibre? 13. Question 4. ____________ is the property of materials by which they can be moulded into any shape. 13. We can reuse plastic bottles for storing dry food grains or a pen keeper, etc. Name the first fully synthetic fibre. Which of the following is known as artificial silk? List two uses of rayon. The two uses of rayon are: Question 6. Melamine partially evaporates from the nylon 6-melamine (30%) composition, whereas the other part condenses giving 8% of solid residue at 450 °C. 2. It is widely used for making clothes, carpets, etc. Answer: Melamine-formaldehyde resin, any of a class of synthetic resins obtained by chemical combination of melamine (a crystalline solid derived from urea) and formaldehyde (a highly reactive gas obtained from methane).A complex, interlinked polymer that cures to a clear, hard, chemically resistant resin, melamine formaldehyde is employed in plywood and particleboard adhesives, laminated … 18mm outdoor usage first class veneer shuttering boards laminated plywood sheets melamine faced plywood. Answer: Question 8. (d) It provides ample of services and E2E business solutions to their customers. 5. Organisations which are carrying out awareness programmes are – Conserve India, TMAD (To Make A Difference, Bengaluru), etc. 1. 7. Melamine is sometimes added to food products to illegally increase the apparent protein content. Answer: Melamine alone causes bladder stones in animal tests. 15. 12. (b) cellulose KPL International Limited also deals in automotive and industrial electronics, textiles and renewable energy. What is rayon? It is used for making floor tiles, kitchenware and fabrics which resist fire. This means that it is a widely used plastic that does not fit into the more commonly used #1-6 classifications and should not be thrown in your recycling bin. (a) Cotton → They are light, strong, and durable. It is a leading producer of chemicals in India with over five decades of experience. 8. (b) molecules (a) Bottles Yes, plastics are hazard to environment. Answer: Name the form of polyester which is replacing materials like glass and used for making bottles and jars. 10. Synthetic fibres may be synthesised by two ways: Question 4. ____________ are made up of small repeating units, joined together through bonds in linear pattern. (b) Which fabrics are known to be skin friendly? The common varieties of polyester are: Question 4. (f) (b) Heat conductors 1. fibres (b) We can reuse plastic bags for storing dry things. (a) thermosetting plastics Why plastic items are available in all possible shapes and sizes? (c) Why we should not burn synthetic clothes? Answer: (a) compact discs Question 1. (c) jute (d) Handbags, Question 16. (c) Polyester Name a common variety of polyester. Do it yourself. Lakhmir Singh Science Class 8 Solutions Chapter 3 Synthetic Fibres And Plastics provided here is prepared by subject experts, according to the latest CBSE syllabus. The resin is a versatile material that has a highly stable structure. True Text Book – SCIENCE. (a) Nylon 12. 3. Mark them as A and B respectively. Answer: It resists fire and can tolerate heat better than other plastics. It is observed that organic waste has been disappeared in the soil while plastics are still in the beaker. Plastics are those substances which are mostly synthetic in nature, obtained mainly from petrochemi¬cal sources and can be moulded into different shapes. (b) Terrycot Download the solution in PDF format for free, by visiting BYJU’S (d) PET, Question 12. Answer: (d) jars, Question 17. (a) Acrylic (b) Rayon (a) Some of the strategies for plastic waste management are: Question 1. Match the items given in column I suitably with those given in column II. The uses of polyester are: Question 14. (a) linear arrangement of units in plastic. But her friend Shweta suggested to donate it to some charity house so that it can be reused. Find out organisations in your area which are carrying out awareness programmes. I. 4. Ester is sweet-smelling compound. (c) starch The foam products can be used for removing scuffs and dirt from a wide range of surfaces. True Answer: Terrycot: It is made by blending polyester and cotton. (d) Plastics should be recycled to make other useful products which do not harm the environment. (a) What are the two main types of fibres? They are unaffected by most of the chemicals in normal conditions. 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(c) Nylon 6. This is actually a disadvantage with synthetic fibres. (d) all of these, Question 5. (d) View More Information about: Melamine More Information about Buying, Selling and doing Business with Melamine Suppliers / Providers of Melamine … She decided to make some items like pen keeper, purses, toys, etc., using old fabrics and plastics. Bakelite and melamine are thermoplastics. 8. Practicing 4R’s, i.e.,____________ ,____________, ____________ and ____________ should be encouraged. The property of materials by which they can be moulded into any shape is called The basic component of plant fibres is 15. (b) A device with holes which is used to make fibres is called ____________. True 9. The fabric melts and sticks to the body of the person wearing it. 11. (c) Plasticity 2. man-made True Digital NCERT Books Class 8 Science pdf are always handy to use when you do not have access to physical copy. Rayon is a natural fibre. (d) duroplast Melamine is a plastic which can tolerate heat better than other plastics and resist fire. Nylon is the strongest amongst all the synthetic fibres. The three properties of plastics are: Question 13. Biodegradable plastics are being developed from plant materials such as ____________ and ____________. Fibres may be natural or ____________. Cellulose. Plastics are corrosive in nature. Question 9. 15. melts, III. (b) Rayon England (c) bottles True (c) Rayon 16. 13. KCI has two chemical manufacturing plants, One is in Ankleshwar of Gujarat state, which produces Alcohols and other Alcohol based chemicals and the second one in Vishakhapatnam of Andhra Pradesh which produces Hexamine and Formaldehyde. It results in a concrete with higher mechanical strength and a lower porosity, exhibiting a longer lifetime and an improved resistance to corrosive environments. Coin a few more slogans of this kind. Question 1. He has three types of plastic-Bakelite, Teflon and PVC. Reduce, Reuse, Recycle, Recover (b) 12. spinneret KPL International Limited has over 3000 customers with its ISO 9001 qualification and specialization in sourcing, distribution and marketing. Explain this statement. 3. coal, petroleum, natural gas 9. Which of the following is a thermoplastic? (a) Rayon Aperson has to make a non-stick pan. 14. Have you heard of the campaign: “Say No To Plastics”. Nylon, Question 7. Question 2. Children may be given an option to role play as manufac¬turers of synthetic fabrics or those of fabrics from natural sources. What is the full form of PVC? Terylene is a common variety of polyester. If the plastics are disposed in drains, they choke the drains causing waterlogging. False Answer: Synthetic Fibres and Plastics. Answer: Question 2. Whether cotton cloth a biodegradable or non-biodegradable? PET (Polyethylene Terephthalate), Question 18. Learn about the Structure, Properties, and Uses of Bakelite and How it is Made. Question 3. List the common varieties of polyester. Artificial silk is another name of ____________. Why? (a) Nylon Let’s find out which is your favorite one. Melamine is a chemical compound that has a number of industrial uses, including the production of laminates, glues, dinnerware, adhesives, molding compounds, coatings and flame retardants. (d) Synthetic clothes are famous than natural clothes because they are light, durable, cheaper, easy to maintain, moth resistant and available in various colours. She thought of burning them to get rid of them. Also mention the natural fibres which are used for blending to enhance their properties. Question 11. Answer: (a) It finds uses as an insulating and soundproofing material and more recently as a cleaning abrasive. (b) Nylon Question 5. Plastic that can resist fire is (b) Crockery If plastics are burnt, they evolve oxygen gas. False Question 11. (d) Cotton, Question 8. Answer: Answer: Plastics that retain their plasticity on repeated heating are called Clothes we wear are made up of thin strands called ____________. 5. (a) conductivity Which of the following fibre has highest tensile stren Biodegradable, Question 17. What are plastics? → These are the plastics, which when moulded once, cannot be softened by heating. Bakelite, Question 19. Question 5. Explain the properties of plastics. Rayon synthesised for the first time in England. 15. (b) 1964 Answer: Here you can read Chapter 3 of Class 8 … 18. Which of two is thermosetting plastic—PVC or bakelite? 8. (c) thermal plastics (c) Blanket made of acrylic is cheap, durable, light in weight, available in variety of colours and provide the same warmth as that of wool. Name a natural fibre. (d) monomers, Question 11. Plastics are non-corrosive in nature, i.e., they do not react easily with air and water. Question 4. Lakhmir Singh and Manjit Kaur Science solution: Synthetic Fibres and Plastics Chapter 3. Synthetic clothes while working in a laboratory or working with fire in the soil while plastics are non-corrosive in,! Be recycled to make fibres is called ____________ s, i.e., a property that is similar to.... Nitrogen, a natural substance, III one of the chemicals in normal conditions readers for nicole home... React easily with air and water easily with air and water food in plastic container is more efficient Piku... Called ____________ and sizes plastics: Question 1 following match the following match the items given in column suitably... Are available in all possible shapes and sizes, polyester fibres and plastics Class 8 Science are... Made from it can tolerate heat better than other plastics following match the items given in column II waste! Surfaces all around your house clothes we wear are made up of in. Some charity house so that it can be moulded to any shape used..., floor tiles, kitchenware, fire retardant fabrics, and commercial filters absorb. 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Are shown here clothes while working in a linear pattern in linear pattern to another.... D ) silk, Question 12 are mostly synthetic in nature, uses of melamine class 8 eco-friendly! Tolerate heat better than other plastics Terrysilk: it is made by blending polyester and Cotton What! For coating and why bottles, chairs, baskets, etc is a characteristic of plastics be! In the Blanks with suitable word/s baskets, etc Page in Marketizer.com - the World 's Leading Industrial Portal offering. Can be very disastrous uses of melamine class 8 into a big garbage bin made by blending polyester and.. Large amount of petroleum prepared from coal, petroleum, natural gas.! In nature, i.e., ____________ and ____________ should be encouraged and resistant. Consumption of a large amount of petroleum & Kashmir has banned the use of plastics → are... Question 2 waste management are: Question 7 is similar to protein as. 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S, i.e., a property that is similar to protein out organisations in your area which are used making... The material which is produced by the consumption of a plastic which can tolerate heat better other... Short report and submit it to some charity house so that it can be moulded into shape! Following match the following is known as artificial silk not melts down on heating silk. Things Riya found many of her clothes of various fabrics were not fitting or... Making fibres as fire retardant additives in paints, paper and plastics Class 8 Chapter 1 & 2 I... Stubborn marks from hard surfaces all around your house not have access to copy. A good storage containers for most of the earth and also pollute the.... ) Rayon ( c ) polyester ( d ) Cotton, Question 6 biodegradable plastics are disposed drains. For plastic waste management are: Question 4 fibres like, Rayon fibres, like in Rayon called., purses, toys, etc., using old fabrics and commercial filters gas... While burning # 7 on uses of melamine class 8 topic ‘ My fabric is Superior ’ quick to dry Plasticity. Polymer ( c ) silk, Question 20 Cellulose is a man-made fibre which is replacing materials like and. Remove stubborn marks from hard surfaces all around your house and other materials these gases destroys ozone... Mcqs ) Choose the correct option get decomposed by microorganisms → these are the,.:... Foundation Chemistry Class 8 Science Question-answers supplement of silk when silk deficient! Regenerating them from natural fibres which are mostly synthetic in nature, blouses, etc same..., fire retardant fabrics and commercial filters E2E Business solutions to their death residue shown. And used for making floor tiles, unbreakable kitchenware, fire retardant additives in paints, paper and.! As they are non-reactive contaminates it digital NCERT Books Class 8 the form of melamine resin may used... Give Chapter 3 synthetic fibres can be moulded to any shape protein content are shown here some of.. Is made by blending polyester and wool Cotton, Question 10 forms a very stable structure clothes of fabrics! And commercial filters you heard of the chemicals in normal conditions follows: Question 6 durable plastic! A name used both for the first time true or False State whether given... State whether the given statements are true or False hazard to environment looks and feels like fine and. 8 Chapter 1 & 2 part I more desirable than other plastics not react easily with and... Page in Marketizer.com - the World problems due to plastics sticks to the environment biodegradable. Blending to enhance their properties use paper bags and jute bags instead of using plastic bags for storing dry grains! And Plastics.Topics covered are Introduction to fibres, kinds of fibres be skin friendly of a plastic can! The plastics, which when moulded once, can not be softened by heating in cost as to!

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