Therefore, we must avoid the use of plastic as much as possible. A. For example, Bakelite is a thermosetting plastic which is a poor conductor of heat and electricity. Synthetic fibres become more popular than natural fibres because they are cheaper than natural fibres. Bakelite is an old trade name for Phenolic thermoset plastic which was developed by Leo Bakeland about 100 years ago. Bakelite Bakelite was the forerunner of the modern plastics industry. Plastic: All the plastic materials are organic polymers with a repeating unit called monomer. View Answer. Answer: The molecules set the way batter sets in … It is used to make floor tiles, kitchenware and fire resistant fabrics. B. melamine The use of plastic has a bad effect on the environment because it is non-biodegradable. What is rayon? B. it is obtained from wood pulp Plastics are used for making intravenous blood bags and heart valves as well. The reaction involved is condensation reaction in the presence of either a basic or acidic catalyst. (C) Terylene State the uses of PET. B. melamine It is therefore, safe to keep food in plastic containers. Write the full form of PVC. Vulcanised rubber is a thermosetting polymer which is used to make tyres. Bakelite is a thermosetting plastic which is a poor conductor of heat and electricity. Question 67. Question 22. Classify the following as biodegradable and non-biodegradable materials: Woollen clothes, Polythene bags, Paper, Aluminium cans, Toothbrush, Peels of vegetables and fruits, Cotton cloth, Jute bag, Electric switch, Frying pan handle. B. polythene Polythene, PVC- Poly vinyl chloride, bakelite and melamine are the examples of different plastics. It is obtained by the chemical treatment of wood pulp or cellulose. Melamine is a thermosetting plastic which is resistant to fire and can tolerate heat better than other plastics. Answer: Answer: Plastics are used in the packaging of tablets, syringes, doctor’s gloves and a number of medical instruments. Answer: Question 16. Answer: D. both are cellulose polymers It is lustrous and easy to wash. Choose the thermoplastics and thermosetting plastics from the following: Melamine, Polythene, Bakelite, Polyvinyl chloride It takes several years for plastic to decompose and it is not environment friendly. What is meant by biodegradable and non-biodegradable materials? Question 54. (C) Polythene The plastic which is coated on the uniforms of firemen to make them fire-resistant is: We must take a cotton carry bag or a jute bag while shopping. Answer: The arrangement of units in a plastic can be linear or cross-linked. Answer: Thermoplastics: The plastics which gets deformed easily on heating and can be bent easily are called thermoplastics. D. C and D 2)It was also used in other diverse products such as jewellery, kitchenware, and toys. It is also used for making articles such as socks, ropes, tents, toothbrushes, car seat belts, sleeping bags and curtains. Hence, it became very popular for making clothes. give reasons for your choice? (a) Terylene and PET are polyesters. A and B We must develop the habits which are environment friendly. (b) Used for making parachutes (d) The fibre B which is terylene contains the same type of groups as those in a PET jar. Such small units combine to form a large single unit called a polymer. Explain why, the disposal of plastic wastes is a major problem. Bakelite requires two monomers- phenol and formaldehyde. The synthetic fibre which contains the group similar to those which give fruits their ‘sweet smell’ is: Characteristics and uses. Rayon is the man-made fibre which is regarded as artificial silk. (d) Which fibre (A, B or C) contains the same type of groups as those in a PET jar? The plastics which gets deformed easily on heating and can be bent easily are called thermoplastics. C. terylene Polyvinyl Chloride for Prototype Development on CNC Machines, 3D Printers, & Injection Molding Machines: There are two main issues working with PVC that make it fairly problematic and not generally recommended for use by non-professionals. Once having a wide variety of uses… Nylon is used for making parachutes and rock climbing ropes. Polyester is the synthetic fibre which contains the organic group similar-to those which give fruits their sweet smell. High-Density Polyethylene (HDPE 2), Low-Density Polyethylene (LDPE 4), Difference Between Coronavirus and Cold Symptoms, Difference Between Coronavirus and Influenza, Difference Between Coronavirus and Covid 19, Difference Between Lenovo S2 and Samsung Galaxy S2 (Galaxy S II), Difference Between Kinetic Energy and Potential Energy, Difference Between Exorcism and Deliverance, Difference Between Bactericidal and Bacteriostatic, Difference Between Colonialism and Imperialism, Difference Between 5 HTP Tryptophan and L-Tryptophan, Difference Between N Glycosylation and O Glycosylation, Difference Between Epoxy and Fiberglass Resin, Supermarket bags, plastic bottles (Inexpensive), Detergent bottles, milk jugs, and molded plastic cases, Plumbing pipes, shower curtains, window frames, flooring, Bottle caps, drinking straws, yogurt containers. Answer: Polythene is a thermoplastic polymer. The disposal of plastic wastes is a major problem because of the following reasons: Question 47. Answer: The full form of PVC is polyvinyl chloride. PVC is a thermoplastic. 2 Polyurethane (PU) foam and polystyrene (PS) foam appeared in the 1930s. View Answer. Bakelite is thermosetting plastic. A. both are non-biodegradable C. A and D It can result in choking their respiratory system and can be fatal. Thermosetting plastics are those materials that are made by polymers joined together by chemical bonds, having a highly-crosslinked polymer structure. What are thermosetting plastics? Its tangled polymer chains can uncoil and slide past each other, making it a flexible material. (b) Teflon is used for giving non-stick coating on frying pans. Such small units combine to form a large single unit called a polymer. another synthetic fibre C is made of a polymer D which consists of a number of glucose units joined one after the other. Which of the following has cross-linked polymer chains? How do carelessly thrown plastic bags (polythene bags) affect: Which synthetic fibre feels like wool and used as a substitute for wool? B. polyester Question 8. The fabric will melt and can stick to the body of the person wearing it causing severe burns. ... Give two examples of Biodegradable polymers. It is also used for making parachutes and ropes for rock climbing. Question 7. (iii) Rayon – (a) Prepared by using wood pulp The plastics which when moulded once, cannot be softened by heating are called thermosetting plastics. It is highly durable and is used for making seatbelts and tire cords. It is used to make electrical switches and handles of utensils. A synthetic fibre is made of small units which are joined together. Answer: A material which is not easily decomposed by natural processes is termed as non-biodegradable. For example, polythene and PVC are thermoplastics. It is flexible, resistant to moth, oil and chemicals. For example, polythene and PVC are thermoplastics. Which synthetic fibre contains the organic group similar-to those which give fruits their sweet smell. It played a large role in bringing electronics into the automobile industry because it is heat and electricity resistant. Acrylic is the synthetic fibre feels like wool and used as a substitute for wool. Answer: The physical, chemical, electrical and thermal properties of Bakelite make it a widely used … D. Teflon Answer: Teflon is used for nonstick coating on cookware. Question 52 B. B. rayon What type of shirts should we buy for summer: cotton shirts or shirts made from synthetic materials (like polyester)? Answer: Rayon is obtained by the chemical treatment of wood pulp or cellulose. A. bakelite Name the man-made fibre which is regarded as artificial silk. Answer: Is it possible to add recycled plastic to bakelite? Threads used for stitching wounds are made of medical instruments. Give two examples of each type of plastics. The materials which are not easily decomposed by natural processes are called non- biodegradable materials. Plastic bags thrown in the garbage can be swallowed by the animals such as cows. Question 33. Answer: In case of thermoplastics, the shape hardens when it is cooled, but can be reshaped when heated up again. Plastic is non-biodegradable. During World War II, Bakelite was used in a variety of wartime equipment including pilot's goggles and field telephones. Answer: Create custom Assignments. (a) Synthetic fibres are also called……….or……fibres. (c) for making handles of frying pans? B. both melt on heating It is flexible, resistant to moth, oil and chemicals. (B) Nekamine (D) Bakelite Polymers also occur in nature. Which of the following plastics do not have cross-links between their polymer chains Its polymer chains are joined together by cross-links, so they cannot slide past each other easily. Which of the two is a thermosetting plastic: PVC or bakelite? If the clothes made of synthetic fibres catch fire, it can be very dangerous. These materials are not environmental friendly and cause environmental pollution. Plastics can be used in healthcare in the following ways: Question 43. Polyester is the synthetic fibre which contains the organic group similar-to those which give fruits their sweet smell. Question 24. Which of the following is a man-made fibre prepared from wood-pulp? It is a form of polyester. Melamine and Bakelite are thermosetting plastics. These units are made of chemical substances. (a) man-made or artificial, Rayon and nylon are the examples of synthetic fibers. Which of the following is not a thermoplastic polymer? Based on the arrangement of monomers, plastics are of the following types: Question 30. Hence, it became very popular for making clothes. It is used to make electrical switches and handles of utensils. Now coming to the uses of Bakelite, since this element has a low electrical conductivity and high heat resistance it can be used in manufacturing electrical switches and machine parts of electrical systems. Question 41. Bakelite holds a true position in… It is used for nonstick coating on cook wares. D. cotton Due to such unique properties, synthetic fibres are used to make dress materials. (i) Polyester Answer: Nylon is the first fully synthetic fibre. Question 62. Thermosetting polymers, once moulded, cannot be softened when heated. Esters are the chemicals which give fruits their smell. C. terylene Uses of Bakelite 1)It was used for its non-conductive and heat-resistant properties in electrical insulators, and also in radios and telephones. Rayon can be used in the following ways: Question 52 A. For thousands of years, humans used stone to fashion tools. Give three advantages of polythene over natural materials. It can be recycled, reused, coloured, melted and can be rolled into sheets or made into wires. (D) Ashtray Match the terms of column A correctly with the phrases given in column B: What is acrylic? The disposal of plastic wastes is a major problem. Name a popular polyester. Answer: (C) PVC pipe The materials which gets decomposed through natural processes, such as by the action of microorganisms are called biodegradable materials. It can also be dyed in a variety of colours. D. acrylic Why are thermoplastics not used for making frying pan handles? Answer: (B) Terylene For example, polythene and PVC are thermoplastics. The clothes made from acrylic are relatively cheap and are available in a variety of colours. C. A and C Answer: B. polyester Example: Rayon and Nylon are synthetic fibres. Polythene, PVC- Poly vinyl chloride, bakelite and melamine are the examples of different plastics. Question 13. Although rayon is obtained from natural source, wood pulp, yet it is a manmade fibre. Question 4. (A) Melamine Question 9. (B) Polythene bag It causes environmental pollution. Answer: State whether plastic is biodegradable or non-biodegradable? Melamine is a thermosetting plastic which is resistant to fire and can tolerate heat better than other plastics. It is a special plastic on which oil and water do not stick. Question 34. Answer: Plastics are poor conductors of heat and electricity and can be used for making handles of frying pans. PET is used for making bottles, utensils, films and wires. (a) which materials are polyesters? B. flax Bakelite®, an amber-colored plastic material, is the trademarked name for the phenol-formaldehyde resin invented by Belgian-American chemist Leo Hendrik Baekeland. Answer: (c) Like synthetic fibres, plastic is also a ………… Packaging and food containers, plastic tableware, disposable cups, plates, cutlery, CD and cassette boxes. PVC was originally developed to replace the rubber and glass that was historically used to make flexible tubing and containers. Bakelite was invented in the early twentieth century but it is an important topic of study even in this 21st century. A and B Question 57. Question 78. (d) PET is a material used as a substitute for glass. Over a 50 year period, this material has demonstraced its ability to met the demanding requirements of the healthcare industry. Answer: Answer: C. A and C Question 11. Give one use each of bakelite, nylon and acrylic. It is the man-made fibre which is regarded as artificial silk. The plastics which gets deformed easily on heating and can be bent easily are called thermoplastics. D. both are cellulose polymers Acrylic is a synthetic fibre which appears to resemble wool. It is used in the following ways: Question 25. D. Acrylic, Silk, Wool. Terylene and PET are both polyesters. It releases lots of poisonous fumes into the atmosphere when burned and causes air pollution. The introduction of Bakelitethe worlds first synthetic plasticin 1907 marked the introduction of the Polymer Age. A. nylon Coming from Engineering cum Human Resource Development background, has over 10 years experience in content developmet and management. Write some of the uses of plastics in healthcare industry. For example, we must use a steel lunch box or steel containers instead of plastic ones. It is used for making bottles and utensils which is replacing materials like glass. Question 1: Write the names and structures of the monomers of the following polymers: (i) Nylon-6,6 (ii) Bakelite (iii) Polystyrene Answer: Question 2: Write the names and structures of the monomers of the following polymers: (i) Glyptal (ii) Teflon (iii)Nylon-6 Answer: Question 3: Write the name and structures of the monomers of the following polymers: (i) Buna-S (ii) Glyptal (iii) Polyvinyl chloride Answer: Question 4: Write the names and structures of the monomers of the following polymers: (i) Nylon-6 (ii) Novolac (iii)B… Should the handle and bristles of a toothbrush be made of the same type of plastic material? (c) Bakelite is used for making handles of frying pans. (b) Name the polymer D. Poly wool is a mixture of polyester and wool. It is used in nonstick cooking vessels. Question 27. Ever wondered why the plastic Bakelite was used to make those bangles and chess pieces? Fill in the blanks with appropriate words. These are made by the reaction of phenol and formaldehyde in basic medium. Chemical Structure of Bakelite and Plastic: Difference Between Polymer and Biopolymer, Difference Between Polycarbonate and Plastic. Answer: Explain why, thermoplastics become soft on heating but thermosetting plastics do not become soft on heating. B and C They cannot be reshaped. Filed Under: Chemistry Tagged With: Bakelite, Bakelite and Plastic differences, Bakelite characteristics, Bakelite Chemical Structure, Bakelite properties, Bakelite uses, Bakelite vs Plastic, Compare Bakelite and Plastic, Plastic, Plastic characteristics, Plastic Chemical Structure, Plastic properties, Plastic uses. (i) Polyester – (d) Fabrics do not wrinkle easily (d) The use of plastics can be reduced by using bags made of …………or …………….instead of polythene bags. Question 50. It was also used for patriotic wartime jewelry. B. melamine Melamine is a thermosetting plastic which is resistant to fire and can tolerate heat better than other plastics. Question 51 B. Nylon fibre is very strong, elastic and light. It was prepared from coal, water and air. Fabrics made from polyester does not get wrinkled easily. PET is a very familiar form of polyester. These are used in the manufacturing of toys, combs and different types of containers. Thermoplastics: The plastics which gets deformed easily on heating and can be bent easily are called thermoplastics. Answer: Telephone instruments, plastic toys, cooker handles, plastic covering on electrical wires, electric switches, ballpoint pens, carry bags, plastic bottles, plastic chairs 14. Answer: An Overview of its Properties and Uses. Nylon is used in textile industry to produce clothes. Which of the following plastics is used for making electric switches? Question 28. Write the uses of acrylic fibres. The handle of toothbrush should be hard and strong whereas the bristles should be soft and flexible. The reaction involves of formation of methylene bridges in ortho, para or ortho as well as para position as shown in the following reactions. These are used in the manufacturing of toys, combs and different types of containers. Question 58. It is used for making parachutes and rock climbing ropes. The handle and bristles of a toothbrush should be made of different type of plastic material. It was prepared from coal, water and air. Nylon is the first fully synthetic fibre. Which of the following articles made of plastics ‘can be recycled’ and which cannot be recycled’ ? For example, cotton is a natural polymer which is made from the cellulose. It is the man-made fibre which is regarded as artificial silk. The bakelite bubble was first prepared in the early 1920s. products), and this can be attributed to its highly versatile nature. What is polyester? Which of the following plastic objects can be recycled? We must try to minimize the use of plastic materials. Answer: Cotton is a natural fibre. It is flexible, resistant to moth, oil and chemicals. The similarity between artificial silk and cotton is that: C. acrylic It was prepared from coal, water and air. Polyvinyl Chloride (PVC) When talking about polymers of commercial importance we must discuss PVC. Question 66. Bakelite is a thermosetting plastic which is a poor conductor of heat and electricity. Modern healthcare would not be possible without the use of plastic materials. It is because of the unique properties it possesses. It is a special plastic on which oil and water do not stick. C. nylon Answer: C. rayon They melt on heating. What are the various ways to save the environment from excessive plastic wastes? It is used to make floor tiles, kitchenware and fire resistant fabrics. D. Bakelite The arrangement of units in a plastic can be linear or cross-linked. A. nylon B. melamine C. bakelite It is used to make electrical switches and handles of utensils. The arrangement of units in a plastic can be linear or cross-linked. Polyester is the synthetic fibre which contains the organic group similar-to those which give fruits their sweet smell. Polythene bag and PVC pipe are the thermoplastics which can be recycled. Which of the following is not a synthetic fibre? B. rayon It is used for making bottles and utensils which is replacing materials like glass. Synthetic fibres such as nylon or polyester are different from the natural fibres. Answer: It takes several years for plastic to decompose and it is not environment-friendly. Synthetic fibres absorb very less water and they dry up quickly. (d) paper or jute bag Disposal of plastic is a major problem. Resin products no better than bakelite from a health viewpoint are used everywhere these days. Plastic is non-reactive. 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