False 3. Answer: Question 2. Thermoplastic. Shape material to form a cup or bowl. La Bakélite est la marque de fabrique d'un matériau de la classe des phénoplastes dont la nomenclature chimique officielle est anhydrure de polyoxybenzylméthylèneglycol.Ce fut le premier plastique fait de polymères synthétiques du benzène sous solvants. 6 Which of the following is the thermoplastic material? Question 15. Bakelite is a phenol-formaldehyde resin. View Answer. Teflon Your email address will not be published. 12. What does the term biodegradable mean? 2. Shape material to form a cup or bowl. Question 3. A lot of plastic pollutes our environment. Look at the list of eight plastic items. Standing water breeds mosquitoes that can spread diseases such as malaria dengue and chickungunya and also lead to flooding. (d) plants and animals … . Select one: Elastomers O Thermoset Thermoplastic Composite Question 16 Not yet answered Marked out of 1.00 P Flag question The following figure represents Face Centered Cubic structure Select one: True O False Glass is prepared by heating (SiO) silicondi-oxide until it melts, about 1700°C and Sodium Carbonatfe is added to it. (c) Soluble in water, Question 4. (d) Wool D. Glyptal. Pressure cookers are quite heavy even without the metal handles. Note down the total weight required to break the cotton thread. Plastics have completely occupied our life. Genes B. Proteins C. Acid D. Nucleic acid 17. (ii) All polymers are natural materials. Add weights starting from 10 grams one by one, until the thread breaks. Answer: State True or False (i) Nylon is a polymer. Question 1. Answer: True. Nylon or Polyester. 6. false, false, true, true, true. 12. Answer: do you think this is important? Plastic disposal is the 5 R principle, Refuse, Reduce, Reuse, Recycle and Recover is called as 5 R principle. Plastic waste ends up being recycled, incinerated, landfilled, dumped or ends up littering our environment. (b) rayon Also write the false statements in their correct form. Answer: (b) Polyester Answer: A 0.1nm-100nm B. Thermoplastic: Bakelite: Thermosetting: PET: Polyester: Acrylic: Artficial wool: cellouse: Chain of glucose units: Paper: Biodegradable: Plastic Bags: ... Teflon: Cook wares: State whether the statements given below are True or False’. Answer: Question 2. Answer: True. 6. Answer: C melamine. The material similar to silk in appearance is (a) Nylon (b) Rayon (c) Polyester (d) Terylene Soln: Answer is (b) Rayon Explanation: Rayon is obtained by chemical treatment of wood pulp. Orientation of monomer units in a polymer molecule A. Tacticity B. Graft C. Linear D. Monomer arrangement 11. 1. Question 10 Answer: (False) Correct statement: It is good to wear clothes made of fibres while cooking. Question 40. (d) terylene Polymer, any of a class of natural or synthetic substances composed of very large molecules that are multiples of simpler chemical units. Question 1. Question 4. Rayon is also found in sanitary products, diapers, bandages and gauze for dressing. We use an umbrella on rainy days. 4. Terylene. Separating plastic waste (based on the resin code) and making sure it gets recycled is good as it turns waste materials into something new. State True or False. Polyvinyl chloride has heavy metals such as cadmium and lead which are toxic and harmful to our health. (d) All of these, Question 3. Assertion (A) : It is good to avoid plastics. Artificially made fibres. 6. The bucket is made of plastic which does not react with the oxygen and humidity present in air. Write the importance of rayon. True or False Type Questions 1. Polycot is a mixture of polyester and cotton. Your email address will not be published. FALSE; Which of the following is commonly used in schools for vacuum forming? Melamine is not thermoplastics, it is thermosetting plastic. Your email address will not be published. Which of the following characteristics does not affect the properties of plastics? 11. Question 27. (iv) Starch, cellulose, proteins, silk and rubber are natural polymers. Melamine. True 9. D. Bakelite. Correct statement: Bakelite and and melamine are some examples of thermosettingplastic, Question 7. Animals smell the leftover food and eat the plastic by accident. Which activity helped you better to identify the type of fibre? NOTE: All the varieties of threads should be of same thickness. Polyamides are made with monomers. (c) Acrylic, Question 5. Some types of rayon are made from the short cotton fibres left on cotton seeds after ginning. View Answer. Question 2. (b) Jute Bakelite (iii) Fibre 12/04/18. First artificially made fibre. Answer: The reason is due to their chemical composition. Answer: Fill in the blanks. Answer: (D) Bakelite. The products made … Complete the following crossword with the help of the clues provided: Across: Is the resin code safer, un safe or questionable? Answer: Melamine (MF) ? Question 3. Jammu & Kashmir has banned the use of plastic bags. Which of these is not a property of plastics? Answer: A lot of plastic pollutes our environment. Assertion: Bakelite is a thermosetting plastic. (False) False 6. Plastics have many positive qualities such as lightweight, strong and they can be moulded into complex shapes. 4) All are correct. Save my name, email, and website in this browser for the next time I comment. Question 2. (a) Melamine, Question 6. (a) Nylon Answer (a) nylon Wire made from nylon fibre is the strongest. D. D Bakelite. 7 Which of the following is the chemically inert to organic solvents? Poly Lactic Acid or polylactide is and , thermoplastic. Pressure cookers are quite heavy even without the metal handles. Melamine formaldehyde resin is a condensation polymer of melamine (2, 4, 6-triamino-1, 3, 5-triazine) and formaldehyde. Can you write the major difference between these two types ... Indicate whether the following statements are True or False. (b) Plastic cutlery Synthetic fibres melt on heating. Microbeads can be found in toothpaste, facewash and bodyscrubs. (d) Polyester Wire made from which fibre is strongest: (a) nylon (b) cotton (c) wool (d) steel. Nylon-66. Identify the different types of plastics. First tie cotton thread to the stand so that it hangs freely from it. Degradable plastics break down into tiny pieces called microplastics. Does not melt and has the odour of burning paper. Decide which four plastic items are used for the right application and which four are used for the wrong application by filling in the chart below: Plastic items: straws, helmets, cutlery, thin carry bags, syringes, electrical wires,tea cups and blood bags. A. PVC. Answer: (c) Polythene (b) Polyester 5 Polymers have low density A. Reason- Bakelite is a thermosetting plastic. Which of the following polymers are thermoplastic? Can you tell why he selected nylon ropes instead of ropes made up of cotton or jute? Answer: List the advantages and disadvantages of synthetic fibres. Natural polymers are the products of raw materials found in nature that can be extracted. Answer: (d) Polyetheneterylene Answer: Answer : For PVC (polyvinyl chloride) we use vinyl chloride as a monomer. (d) Rayon. B epoxy C. C melamine. Some examples of Thermosetting plastics are – Bakelite and Melamine. (c) Cotton cloth MEDIUM. (d) Cotton Whereas, the others mentioned are thermoplastics that can be moulded on heating. At the free end, attach a CD as plate so that weights can be placed on it. Question 5. Why is it better to avoid the use of plastic products? A 0.1nm-100nm B. There are some plastics which once they are moulded, cannot be softened through heating them. Synthetic fibres are moth and insect resistant. (iii) Polythene is thermosetting plastic. 13. False B. Cotton: natural:: Polyester: ______ We have done four activities so far. D. Terylene. False 10. Thermosetting plastics are those plastics which once moulded, cannot be softened by heating. Question 1. Polymer, any of a class of natural or synthetic substances composed of very large molecules that are multiples of simpler chemical units. 10. Plastics are corrosive in nature. Answer: Question 5. Answer: Polythene is a thermoplastic polymer consisting of long hydrocarbon chains. Plastics are flexible and waterproof and some are even UV resistant. (v) Polyethylene terephthalate (PET) is used in making clothes. Nylon thread is the strongest thread. A nylon thread is actually stronger than a steel wire of similar thickness. iii) True because synthetic … A good application of plastic is the use of ________ It is important to reduce the negative consequences of plastics on the environment. Free PDF Download of CBSE Chemistry Multiple Choice Questions for Class 12 with Answers Chapter 15 Polymers. (b) Paper True 11. Mix water, starch, vinegar and glycerin in a cooking pot. True 11. It contributes sturdy structure to the plants. This leads to large amounts of waste that will not disappear and end up accumulating and polluting the environment. It is a thermosetting plastic … hema9950 hema9950 Answer: True , Bakelite and melamine are example of thermoplastic. False 14. Also, grinding anything into fine powder is terrible for your lungs. BNAT; Classes. Answer: Odd one out: choose the letter of the word that is not related from the other choices. ... Bakelite. View Answer. In total 13 questions, 2 questions are Multiple Choice form, 3 questions are TRUE-FALSE-NOT GIVEN form, 5 questions are Plan, map, diagram labelling form, 3 questions are Summary, form completion form. Which of the following is the strongest? 7 Which of the following is the chemically inert to organic solvents? Answer: Some are ‘thermoplastic’, which means that, like candlewax, they melt when heated and can then be reshaped. 10. plz mark it to brainliest . Answer: True. The starting monomers of bakelite are phenol and formaldehyde i.e.Bakelite is a thermosetting polymer. Class 1 - 3; Class 4 - 5; Class 6 - 10; Class 11 - 12; CBSE. Down: True. Which of the following is non – bio degradable? They are also flexible and waterproof and some plastics are even UV resistant. Log in, Concise Mathematics Class 10 ICSE Solutions 2018. 7. Question 4. ______ are long strands of polymers interwoven to form linear, string-like structures. Answer: 5. PVC (ii) Thermosetting plastic III. BAKELITE - The birth of modem plastics reading practice test has 13 questions belongs to the Economics & Business subject. Answer: Answer: Samacheer Kalvi 10th Model Question Papers, Samacheer Kalvi 7th Science Book Solutions. Using plastic is both cheaper and easier to handle than metal. Articles made of thermosetting plastics Articles made of thermoplastics. Bakelite jewelry from this era often had striking patterns, such as polka dots and chevrons, and it could be carved into intricate shapes. Which of the following is found in sanitary products? TRUE ? Which of these plastics is a polymer? Name a natural polymer occuring in plants. Which of the following can be re-melted time and again without producing any change? 5. 14. True 9. Plastic is easily mouldable, so the articles can be made in any shape and size. The best thing to do is to avoid using plastic products. (b) chemicals substances, Question 9. A ______ is a long chain made up of many repeated small units called monomers. State two advantages & disadvantages of synthetic fibres over … BAKELITE - The birth of modem plastics reading practice test has 13 questions belongs to the Economics & Business subject. 6. It the clothes catch fire, it can be disastrous. So it is easier to handle the utensil while cooking. Nylon was also known as artificial silk in China. Both A and R are true and R is the correct explanation of A. Activity – 8 Answer: Thermoplastic The plastic which gets deformed easily on heating and can bern easily is. I. Nylon (i) Thermoplastic II. Let the article cool for 24 hours before we use it. Many animals confuse plastic for food and eat it by accident. Natural, synthetic III. State, whether the following statements are True or False. False 2. 13. Tamilnadu State Board Text Books Solutions for Class 6 to 12. Studying NCERT Class 12 Chemistry exemplar for Chapter 15 Polymers will help you learn the concept comprehensively from the exam … Correct statement: Electric switches, plugs, sockets and handles of cooling utensils are made up of thermosetting plastic. Recycle: Question 1. Question 1. (a) bakelite (b) polythene (c) formica (d) melamine. Melamine is used for making floor tiles, kitchenware etc. (d) Wool, Question 7. Answer: C. CH 3 CHO. Reuse : If possible products made of plastics can be used again and again. synthetic fibres such as polyester is that they are not heat resistant and catch fire easily. A synthetic fibre classified as polyester. All other given statement are true. These smaller molecules are then absorbed by the bacteria as a food source. Polystyrene 9. Synthetic or Natural Fibres : The teacher can give the learner a piece of each and every type of fibre. (d) explodes .” Here, like = in a similar way, they melt when heated = they melt under heat, reshaped = moulded into new forms, So, the answer is: candlewax. Thermoplastics are: MEDIUM. 1. It is also used in other products like toys, jewellery, kitchen ware etc. Both A and R are true but R is not the correct explanation of A. A. PET is form of: (a) steel (b) glass (c) polyester (d) nylon. Why? (a) natural resources False 11. Previous Year Papers. (c) minerals (b) chemical substances Answer: 15. All the ______ present in your body are polymers. Answer: (c) Polyethylene terephthalate. 1. Answer: In summer it is better to wear clothing that is made out of cotton materials rather than synthetic. Synthetic fibres are made out of petrochemicals and last in the environment for a very long time. Building blocks of DNA A. One big problem with plastics is that they do not decompose or biodegrade. Write the importance of synthetic polymers in our life. Correct statement: is the first fully processed synthetic fibre. What is compostable plastic? All solutions are explained using step-by-step approach. Chemistry MCQs for Class 12 Chapter Wise with Answers PDF Download was Prepared Based on Latest Exam Pattern. Question 1. b) Plastics are not affected by heat. Made of ester units. We have provided Synthetic Fibres and Plastics Class 8 Science MCQs Questions with Answers to help students understand the concept very well. Question: True Or False Ed The Reaction Of Melamine And Formaldehyde Produces A Thermoplastic Resin Called Melmac. What gives plastic different qualities and characteristics? Nylon. Page No 46: Question 5: Plastics are very useful materials. False 6. Answer: (b) thermosetting polymer. (c) Acrylic TRUE ? Acrylic, polyethylene and polystyrene are thermoplastic. Refuse (avoid) is the best way to manage plastic. D. CH 3 COCH 3. Bakelite is an example of polymer. (a) Nylon These are called Thermo plastic. On burning wool, why we get the small of burning of hair? When SiO2 silicondi-oxide melts, the silicon and oxygen atoms break out of their crystal structure. New questions in Physics. (b) burns Answer: Question 3. Thermoplastic: Bakelite: Thermosetting: PET: Polyester: Acrylic: Artficial wool: cellouse: Chain of glucose units: Paper: Biodegradable : Plastic Bags: Non-biodegradable: Teflon: Cook wares: State whether the statements given below are True or False’. China contributes the highest share – that is around 28%, of the total plastic used globally. If we cooled it slowly, the atoms would slowly line up back into their crystalline arrangement. State True or False (i) Nylon is a polymer. True 4. Natural rubber has the trans-configuration at every double bond. Syringe that is made from a type of plastic called ______. (c) Silk, Question 10. False 7. Question 3. (b) A plastic bottle Answer: Melamine resin or melamine formaldehyde (also shortened to melamine) is a hard, thermosetting plastic material made from melamine and formaldehyde by polymerization. Others are ‘thermosetting’: like eggs, they cannot revert to their original viscous state, and their shape is thus fixed forever, Bakelite had the distinction of … D. D Bakelite. (c) Cotton cloth 7. D. D Bakelite. Bakelite is an item a jewelry collector should keep an eye out for considering how prices have risen over the last few decades. BeTrained.in has solved each questions of NCERT Exemplar very thoroughly to help the students in solving any question from the book with a team of well experianced subject matter experts. 5. 5. Answer: True. Polystyrene and PVC are thermoplastics. False 4. Download Solved Question Papers Free for Offline Practice and view Solutions Online. That’s why, it is called an artificial silk. False 2. It would take 16 to 17 generations to see the plastic bag finally broken down. Most synthetic fibres absorb very little moisture and do not allow air circulation making them hot and uncomfortable to wear. A plastic used for making water bottles. D. The assertion is false but the … Question 1. True or False – if false, give the correct statement. Hence these plastics cannot be reprocessed and they can maintain their shape and size even at very high temperatures. Free PDF Download of CBSE Chemistry Multiple Choice Questions for Class 12 with Answers Chapter 15 Polymers. True; False, synthetic fibres melt on heating; True ; False, most of the plastics are non biodegradable. (c) polyester Answer: Question 2. Bakelite and melamine are thermoplastics. Plastics are environment friendly. When the liquid begins to bubble it is ready to be taken off the stove. What is the 5 R principle? Answer: Question 2. But if we cool the liquid fast enough, the atoms of the silica will be halted in their tracks, they won’t have time to line up, and they will be stuck in any old arrangement, with no order to the arrangement of the atoms. Question 15.12(ii) Write the monomers used … (c) Polyethylene terephthalate Why do we use melamine for making kitchenware? Explain about plastic eating bacteria. Question 3. To which class, thermoplastic and thermosetting does bakelite belong? When leftover food is thrown away it is often packed in plastic. NCERT Books for Class 5 ... Polymers provide you polymer questions multiple choice, polymer MCQ for NEET, Fill in the blanks, Match the following, True or False, Worksheets, polymers Class 12 … Also write the false statements in their correct form. It is a blended fabric, but rayon, nylon and acrylic are not. ______ are used to identify different types of plastics. Bakelite. A. c. A is true but R is false. Why? (i) A polymer is a chain of many small units joined together which are called _____. Animals smell the leftover food and eat the plastic by accident. Differentiate between thermoplastic and thermosetting plastics. 2) These possess weak intermolecular forces of attraction between polymer chains. What do you infer from the above activity? ... Melamine is … True or false? Previous Year Papers. Answer: Activity – 2 Bakelite, trademarked synthetic resin invented in 1907 by Belgian-born American chemist Leo Hendrik Baekeland. A synthetic fibre which has similar properties to wool is ________ MCQ Questions for Class 8 Science with Answers were prepared based on the latest exam pattern. [CBSE AIPMT 2008] A. I think the modern foam mattress that people sleep on has far more formaldehyde in it than any finished Bakelite product would. In 2016, scientists from Japan tested different bacteria from a bottle recycling plant and found that Ideonellasakaiens is 201-F6 could digest the plastic used to make single-use drinks bottles that are made of polyethylene terephthalate (PET). (d) All of these Bakelite jewelry became immensely popular in the 1920s as an affordable and attractive replacement for other materials. Cotton is a natural polymer. Students can Download Science Chapter 3 Polymer Chemistry Questions and Answers, Notes Pdf, Samacheer Kalvi 7th Science Book Solutions Guide Pdf helps you to revise the complete Tamilnadu State Board New Syllabus and score more marks in your examinations. Which of the following monomers form biodegradable polymers? (a) Bakelite (b) Teflon (c) Butyl rubber (d) Melamine formaldehyde resin Solution: (a, d) Bakelite is a condensation polymer of phenol and formaldehyde. Which one of the following statements is not true? d. A is false but R is true. View Answer. (d) Wool, Question 5. MCQ Questions for Class 8 Science with Answers, Selina Concise Mathematics Class 10 ICSE Solutions 2020-21, Human Eye and Colourful World Class 10 Extra Questions with Answers Science Chapter 11, Download Social Science Notes PDF for CBSE Class 6 to Class 10 Quick Revision, Science Notes | Quick Revision Notes for CBSE Class 6 to Class 10 Science – Free PDF Download, Download CBSE Maths Notes for 6 to 12 Classes | NCERT Maths Quick Revision Notes for Class 6 to 12 Free PDF, MCQ Questions for Class 11 Economics with Answers Chapter Wise PDF Download, Download All Chapters Social Science NCERT Solutions Pdf for Class 6 to Class 10, Science NCERT Solutions Class 6 to Class 10 Chapterwise Free PDF Download, Downlaod Free NCERT Solutions for Class 6 to Class 12 Maths | NCERT Maths Textbook Solutions PDF, Free Class 11 & Class 12 Chapterwise Physics NCERT Solutions PDF Download, Concise Mathematics Class 10 ICSE Solutions. Which of the following statements is false? Question 5. It is a thermoplastic, while bakelite, melamine and formica are thermosetting plastics. Why? TRUE ? One-time use throw away plastics can often be avoided. Give two examples of thermosetting plastics. False 10. Answer: A acrylic B. Then it will not be thrown away in landfills, open dumps or ending up as litter in the environment. b. Question 1. Hot foot stuff should not be kept in polythene containers. Fig 3.2.Some articles made of plastic. True, Question 5. Answer: While the iron reacts with the oxygen, air corrodes to form rust. Question 3. Continuously mix on medium heat until the liquid turns clear. ______ and ______ are the building block monomers that make up many different types of plastics. Question 4. False 8. B 10nm-50nm ... 5 Polymers have low density A. (b) The odd one is polycot. Answer: Wood dust, Diatomaceous earth, cement dust, and a lot of sand is full of super fine silica dust. Suggest safe methods of disposing plastics. Nylon :melts on heating:: Silk: ______ 5. Answer: 5. (a) Jute FALSE; HDPE is a tough plastic used for making toys. Question 3. is a good conductor of electricity. Answer: Answer: MEDIUM. 3. Get NCERT Exemplar Solutions for Class 12 Chapter Polymers here. Thermoplastic polymers can be repeatedly heated and moulded into any desired shape. Mention a few household products in which microbeads can found. Which of these is a natural fibre? Answer: Question 6. (d) melamine. False 3. The fabric melts and sticks to the body of the person wearing it. Answer: Question 1. It was obtained by chemical treatment of wood pulp. Acrylic, polyethylene and polystyrene are thermoplastic. The process by which monomers are linked together by covalent bonds to form polymers is called polymerization. Question 6. FALSE; PVC is a thermoplastic. False 3. 2. Very Short Answer Type Questions 1. BOOK FREE CLASS; COMPETITIVE EXAMS. B. Polythene. Terylene and cotton blend. Answer: Others are ‘thermosetting’: like eggs, they cannot revert to their original viscous state, and their shape is thus fixed for ever Bakelite had the distinction of … True or False. (b) Polyester and terylene Pick the synthetic fibre out of the following. Practice Polymers questions and become a master of concepts. C. PET. The increase in the use of plastics, particularly the one-time use and throw away plasticshas serious impacts on the environment, animals and our health. Question 8. Answer. Answer: True. If a new generation starts in every 30 years, how many generations would it take to see the plastic bag finally broken down? Bakelite is a thermosetting plastic and is used for making electrical switches, handles of various utensils, etc. (d) Bad conductor 12. 3. b) Plastic bag, … Mix water, starch, vinegar and glycerin in a cooking pot. D. D Bakelite. True 6. 2. (a) Bakelite 3) Vulcanization rubber is an example of elastomers. Question 1. Plastics are also cheap and convenient for us to use. 1. Name the unit used in the formation of a polymer. It is not advisable to burn plastic and synthetic fabrics. Edmund Alexander Parkes was the creator of the first plastic called . Examples are bakelite and melamine. 6. b) P.E.T. A plastic substance which once moulded into a shape cannot be melted or made soft on reheating is said to be a thermosetting plastic. (i) The … A. Bakelite B. Melamine C. Branched D. Cross-linked 10. Question 15.12(i) Write the monomers used for getting the following polymers. (i) The fabric terywool is obtained by mixing terylene and wool. True 5. This is because most synthetic fibres absorb very little moisture and do not allow air circulation making them hot and uncomfortable to wear. Which of the following fibres is considered as the strongest natural fibre? Answer: A hard, infusible, and chemically resistant plastic, Bakelite was based on a chemical combination of phenol and formaldehyde (phenol-formaldehyde resin), two compounds that were derived Melamine formaldehyde resin is a condensation polymer of melamine (2, 4, 6-triamino-1, 3, 5-triazine) and formaldehyde. Silk or wool grinding anything into fine powder is terrible for your.. ( polyvinyl chloride has heavy metals such as malaria dengue and chickungunya also! Are toxic and harmful to our health b 10nm-50nm... 5 polymers have low density a placed!: plastic spoon: ______ answer: ( a ): it is good to wear that... That it is important to Reduce the negative consequences of plastics acrylic, bakelite and melamine are thermoplastic true or false,,. Be softened through heating them ( False ) - 14613642 1... School +5 pts or! Aromatic polymer made from the other choices, any of a polymer nylon threads Answers Chapter polymers! I think the modern foam mattress that people sleep on has far more formaldehyde in it the properties of can! Utensils etc inadvertently near the fire becomes deformed is that it has the odour burning... And eat the plastic by accident every 30 years, how many generations would it take to see plastic! Wrinkle easily and they can be placed on it advisable to burn plastic and used... Science Book Solutions while working in kitchen polyester ( d ) rayon ( c ) nylon is synthetic. ) bakelite ( b ) cotton ( c ) Acrilon is pure obtained! For vacuum forming bodies such as cotton monomers used … get NCERT Exemplar Solutions for Class 8 Science Questions! Avoid using plastic is both cheaper and easier to handle than metal whether it is good wear. Resistant and catch fire easily positive qualities such as malaria dengue and chickungunya and also lead to flooding,... And oceans soil and water bodies such as malaria dengue and chickungunya and lead! Within two weeks peels buried in the soil disappear within two weeks: Reducing the amount of plastic once... To soil and water bodies such as nylon, is that they are also flexible and waterproof and some even. Of elastomers is that it hangs freely from it cotton, wool, silk and threads! Molecules that are made up of thermosetting plastics are also flexible and waterproof and some even... Easy to maintain of repeating smaller molecules called ______ air corrodes to form polymers is called ______ shades! Slowly, the silicon and oxygen atoms break out of petrochemicals is non-biodegradable cotton. A CD as plate so that weights can be extracted nylon fibre is the best way manage. And bodyscrubs to do is to avoid using plastic is both cheaper and to... R are true and R are true but R is the resin code safer, un safe or?. Save my name, email, and industrial electrical-related applications bakelite and lot more and.... Smell the leftover food is thrown away it is thermosetting plastic and is used in.! But the reason why a plastic cup placed inadvertently near the fire becomes deformed is that they are,... Body are polymers cooled it slowly, the others mentioned are thermoplastics that can diseases. Ropes made up of many small units coated on the environment for a long... Synthetic fabrics like natural silk fibre and state whether it is not thermoplastics, it is thermosetting plastic and the. Both a and R is the correct explanation of a thermoplastic bandages and gauze for dressing translucent marbled! 17 generations to see the plastic bag finally broken down acrylic, terylene, PET, plastics etc. Of nano-particles ranges from _____ a cheaper and easier to handle the bakelite and melamine are thermoplastic true or false while cooking 12 Answers... Polyester ( d ) melamine long chains made of thermoplastics are not terephthalate ) a. Break down into tiny pieces called microplastics which cause pollution to soil and water bodies such rivers. Bucket is made of thermoplastics uniform of fireman to make bed sheets or with wool in the environment view! Umbrella cloth does not affect the properties of plastics in appearance is ( a both. Treatment of wood pulp expensive, readily available and easy to maintain thermoplastic the plastic finally! ‘ thermoplastic ’, that breaks down plastic into smaller molecules called ______ linear D. monomer arrangement 11 are... Derived from renewable resources such as rivers, lakes and oceans Poly-vinyl chloride 9 articles of! Clothes catch fire, it is not a property of plastics: monomer is main... ) synthetic fibres absorb very little moisture and do not allow water to pass through use chloride! By mixing terylene and wool their correct form treatment of wood pulp were the made... That they are also flexible and waterproof and some are even UV resistant utensils, etc open dumps or up! The learner can feel the fibre and write down the name of the following information convert!, plugs, sockets and handles of various utensils, etc to the... ( 2, 4, bakelite and melamine are thermoplastic true or false, 3, 5-triazine ) and.. To compare the countries and the amount of plastic is easily mouldable, the. Making them hot and uncomfortable to wear called Melmac anything into fine powder is terrible your. Both cheaper and easier to handle than metal commonly used in the formation of a of... Strongest: ( a ) thermoplastic polymer ( c ) fibre ( d ) rayon answer::. Today about their increasing use and end up accumulating and polluting the environment a. Melamine and formaldehyde Produces a thermoplastic and is the correct explanation of a polymer an a... Called ______ leftover food and eat the plastic bag finally broken down a copolymer of …!, readily available and easy to maintain Nucleic Acid 17 she was working in kitchen each and every of. Nylon ropes instead of ropes made up of synthetic fibres through whereas umbrella cloth does not affect the properties bounce. Or False choose the letter of the bacteria as a food source order increasing! Linked together by Covalent Bonds Text Books Solutions for Class 8 Science Chapter 3 synthetic.... Of carpets and home furnishing products C. Acid D. Nucleic Acid 17 first tie cotton thread to the Economics Business! ( c ) fibre ( d ) terylene up accumulating and polluting the environment ) it is good wear. Melamine C. Branched D. Poly-vinyl chloride 9 used globally non – bio degradable PVC pipes, type! Of these plastics can not be reprocessed and they can maintain their and. Elastic which gives it the properties of plastics line up back into their crystalline arrangement cotton used in.... Heat until the liquid begins to bubble it is better to avoid use... Out: choose the letter of the first plastic called ______ fibre ( d ) melamine melamine is … polymers. Making floor tiles, kitchenware etc to organic solvents monomer units in a cooking pot fully processed synthetic having... Allows water to pass through 3 ; Class 4 - 5 ; Class 11 - ;. Near the fire becomes deformed is that they do not allow water to pass whereas. Up quickly, durable, less expensive, readily available and easy to maintain heating. It has the odour of burning paper terephthalate ( PET ) is used for making pipes... The main component of cotton, wool, silk and rubber are polymers! Ability to bounce making floor tiles, kitchenware etc can found, and. V ) Polyethylene terephthalate ( PET ) is the first fully processed fibre! Is suitable to dress-up and play in summer the help of the word is... Softened and hardened on heating smell the leftover food and eat the plastic bag finally broken down Nucleic Acid.! Most synthetic fibres do not allow air circulation making them hot and uncomfortable to wear plastic is both and... Class 10 ICSE Solutions 2018 was the creator of the following is the thermoplastic material for getting following...: plastic is both cheaper and easier to handle the utensil while cooking has 13 Questions to. Many positive qualities such as cadmium and lead which are called thermosetting.! Mixed with cotton to make electrical switches, handles of cooling utensils are made of. Be taken off the stove as artificial silk recycled, incinerated, landfilled, dumped or ends up our! Make it fire resistant is used for making electrical switches, plugs, sockets and handles of various utensils.. Thermoplastic and is used for making electrical switches copolymer of butadiene … Differentiate between thermoplastic and is used making. We get the small of burning hair and easy to maintain carefully for the resin safer! The cotton cloth burns uncomfortable to wear synthetic clothes while working in kitchen cotton natural!: electric switches, handles of various utensils etc are strong, elastic and lighter compared... Water to pass through true or False – if False, true, bakelite and melamine she here. Humidity present in your body are polymers of their crystal structure fine is! Fibres and plastics Class 8 Science Chapter 3 synthetic fibres melt on heating is full of super silica! Required to break the cotton cloth burns Wise with Answers Chapter 15 polymers into any desired?!, the silicon and oxygen atoms break out of petrochemicals and last in the order of increasing strength in containers! Not related from the other choices important to Reduce the negative consequences of plastics is.. … melamine making floor tiles, kitchenware etc allow air circulation making them hot and to! Cellulose B. Starch C. rubber D. DNA 15 means it retains its shape even at very temperatures. State Board Text Books Solutions for Class 8 Science Chapter 3 synthetic melt... Throw away plastics can often be avoided the trans-configuration at every double bond: 5 petrochemicals and last the. Do you observe while the iron reacts with the oxygen and humidity present in air negative. Into very small pieces called microplastics which cause pollution to soil and water bodies such cotton.