Question no. Question 2. plz mark it to brainliest . What kind of fabric is suitable to dress-up and play in summer? (c) Acrylic Degradable plastics break down into tiny pieces called microplastics. View Answer. 6. Option: 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. The scale of the bacteria breaking down plastics is much slower and will therefore not solve the crisis we are facing. Indicate whether the following statements are True or False. (a) nylon Answer: Take Zigya Full and Sectional Test Series. False 10. Question 5. TRUE ? Poly Lactic Acid or polylactide is and , thermoplastic. Using plastic is both cheaper and easier to handle than metal. (d) Rayon Page No 44: Question 6: Which of these plastics can be repeatedly heated and moulded into any desired shape? Name the form of polyester which is replacing materials like glass and used for making bottles and jars. 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. iii) True because synthetic … Rayon is a synthetic fibre having properties similar to that of silk. Tamilnadu State Board Text Books Solutions for Class 6 to 12. True 7. Artificially made fibres. (a) Nylon (b) chemicals substances, Question 9. Authentic bakelite jewelry can sell for thousands of dollars, so it's important you learn how to tell the difference between genuine and imposter plastic jewelry. It can be broken down completely by microbes and turned back into food for plants – COz, methane, water and other natural compounds. All solutions are explained using step-by-step approach. 2) These possess weak intermolecular forces of attraction between polymer chains. Natural rubber has the trans-configuration at every double bond. Answer: That's true of many foam product. Plastic articles are available in all possible shapes and sizes. Answer: True. b. This question has multiple correct options. Many animals confuse plastic for food and eat it by accident. 4 The size of nano-particles ranges from _____ A. It can be repeatedly softened and hardened on heating. 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 Answer. (c) Acrylic, Question 5. A lot of the plastic produced globally is designed to be used only once and thrown away, creating a large amount of plastic waste. Bakelite is a thermosetting plastic and is used for making electrical switches, handles of various utensils, etc. Polycot is a mixture of polyester and cotton. True 4. 1. Ram took with him some nylon ropes, when he was going for rock climbing. Melamine. Which of the following polymers are thermoplastic? Answer: Question 5. Most synthetic fibres absorb very little moisture and do not allow air circulation making them hot and uncomfortable to wear. 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). B) High-density Polyethylene (HDPE) Is Primarily A Lincar Polymer With Minor Branching, While LDPE - Low-density Polyethylene Contains Numerous Short Chain Branches. (i) Polyvinyl chloride . Answer: Reason (R) : Plastics end up polluting the environment. Syringe that is made from a type of plastic called ______. Answer: d. A is false but R is true. Understand the Key Differences Between Thermoplastic and Thermosetting Plastic with detailed explanations and examples. Which of the following statements is false? Polymer, any of a class of natural or synthetic substances composed of very large molecules that are multiples of simpler chemical units. True. (a) Both A and R are true and R is the correct explanation of A, Question 3. Polymers make up many of the materials in living organisms, and they constitute the basis of certain minerals and human-made materials, such as paper and plastics. Question 2. Using synthetic fibres such as nylon, is that they are stronger than many natural fibres such as silk or wool. Answer: True. Answer: Question 2. Answer: Question 3. (d) plants and animals Question 1. Activity 3, 4. Burning of plastics and synthetic fabrics is not a good solution, as we end up wasting non-renewable resources and produce super toxic chemicals that are difficult to store or dispose safely. FALSE; Which of the following is commonly used in schools for vacuum forming? Reason (R) : Nylon made out of petrochemicals is non-biodegradable and cotton cloth is biodegradable. Answer: (D) Bakelite. False 2. Refuse (Avoid): Reduce : Reducing the amount of plastic we use is important. Answer: So it is easier to handle the utensil while cooking. Question 1. Your email address will not be published. True, Question 5. Test Yourself. e) P.V.C. It break down into very small pieces called microplastics which cause pollution to soil and water bodies such as rivers, lakes and oceans. 2. (a) Bakelite 2. c. A is true but R is false. Genes B. Proteins C. Acid D. Nucleic acid 17. Question 2. The starting monomers of bakelite are phenol and formaldehyde i.e.Bakelite is a thermosetting polymer. It would take 16 to 17 generations to see the plastic bag finally broken down. Synthetic fibres are moth and insect resistant. Answer: Since, wool is made from hair of sheep, it gives smell of burning hair. Answer: Question 1. 12. Correct statement: It is good to wear clothes made of fibres while cooking. 7 Which of the following is the chemically inert to organic solvents? Acrylic. Correct statement: Plastics are not environment friendly. Which of the following characteristics does not affect the properties of plastics? All fibres are … The material similar to silk in appearance is (a) Nylon (b) Rayon (c) Polyester (d) Terylene Soln: ... is a thermoplastic and is used for making toys, chappals, etc. Question 8. Bakelite. Download Solved Question Papers Free for Offline Practice and view Solutions Online. 13. State, whether the following statements are True or False. Answer: ______ is a synthetic fibre which is strong and elastic that it has the ability to bounce. (b) Nylon Which type of fibre is the weakest? Why? Which of these fabrics allows water to pass through? 6. Answer: Thermoplastic The plastic which gets deformed easily on heating and can bern easily is. Answer: Melamine / ˈ m ɛ l ə m iː n / is an organic compound with the formula C 3 H 6 N 6.This white solid is a trimer of cyanamide, with a 1,3,5-triazine skeleton. True or false? Melamine formaldehyde resin is a condensation polymer of melamine (2, 4, 6-triamino-1, 3, 5-triazine) and formaldehyde. What is the chemical name of the polymers that make up cotton? 7. 14. A type of fibre that is naturally obtained from a cocoon. All the ______ present in your body are polymers. Which of the following is non – bio degradable? (d) Wool, Question 7. False 6. If plastics are burnt, they evolve oxygen gas. Polystyrene is a synthetic aromatic polymer made from the styrene monomer. Plastics do not decompose by natural processes and action of bacteria and are therefore not biodegradable. 4. 4. For making PVC pipes, which type of plastic is used? If we cooled it slowly, the atoms would slowly line up back into their crystalline arrangement. Question 3. Answer: B. Buna-S is a copolymer of butadiene … (d) Wool 3. Answer. Bakelite is a phenol-formaldehyde resin. 5M 103. What resin codes do you find? 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