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give two uses of bakelite and pvc

Column B These units are made of chemical substances. Making electric fittings such as electric switches, Making plugs and sockets. (i) Polyester Bakelite is thermosetting plastic. For example, polythene and PVC are thermoplastics. Question 7. Name a popular polyester. Question 68. Presented here are the properties and other uses of Bakelite you should know about. It can also be mixed with wool to make carpets. The plastics which gets deformed easily on heating and can be bent easily are called thermoplastics. Bakelite®, an amber-colored plastic material, is the trademarked name for the phenol-formaldehyde resin invented by Belgian-American chemist Leo Hendrik Baekeland. C. PET (adsbygoogle = window.adsbygoogle || []).push({}); Copyright © 2010-2018 Difference Between. Give reasons for your Answer:. A nylon thread is actually very strong than steel wire. Question 31. is: Also, the burning process of synthetic material is quite slow and it does not get completely burnt easily. Polyester is the synthetic fibre which contains the organic group similar-to those which give fruits their sweet smell. An Overview of its Properties and Uses. Therefore, we must avoid the use of plastic as much as possible. It is flexible, resistant to moth, oil and chemicals. USES OF BAKELITE: Bakelite due to its high resistance to electricity and heat is used in automotive components and industrial applications. It is widely used in making household items including food containers. Question 74. Question 21. State the important properties of nylon. Terylene is a kind of a polyester. State one disadvantage of using synthetic fibres for making clothes. The plastics which when moulded once, cannot be softened by heating are called thermosetting plastics. What is meant by the 3R’s principle in the context of use of plastics? For thousands of years, humans used stone to fashion tools. It was prepared from coal, water and air. B and C A material which is not easily decomposed by natural processes is termed as non-biodegradable. D. polyester Chemical Structure of Bakelite and Plastic: Difference Between Polymer and Biopolymer, Difference Between Polycarbonate and Plastic. Following are the non-biodegradable materials: Polythene bags, Aluminium cans, Toothbrush, Electric switch and Frying pan handle. Answer: C. terylene A. View Answer. Question 12. NCERT Solutions for Class 6, 7, 8, 9, 10, 11 and 12. Plastic is a polymer like a synthetic fibre. What are plastics? Which of the following are thermosetting polymers? The fabric will melt and can stick to the body of the person wearing it causing severe burns. We must try to minimize the use of plastic materials. A material which gets decomposed through natural processes, such as action by bacteria, is called biodegradable. Question 35. (C) Polythene Question 24. C. A and D Plastic containers are preferred for storing food because of the following reasons: Question 36. Vulcanised rubber is a thermosetting polymer which is used to make tyres. After the polymer has grown by about 10x, the short polymer precipitates inside the droplet of VCM, and polymerization continues with the precipitated, solvent-swollen particles. Its tangled polymer chains can uncoil and slide past each other, making it a flexible material. Rayon is obtained by the chemical treatment of wood pulp or cellulose. Question 62. C. A and C What is a polymer? A synthetic fibre is made of small units which are joined together. (iv) Nylon – (b) Used for making parachutes Fabrics made from polyester does not get wrinkled easily. The raw materials for synthetic fibres are mainly petrochemicals such as coal. Nylon is the first fully synthetic fibre. Explain the difference between thermoplastics and thermosetting plastics. What type of shirts should we buy for summer: cotton shirts or shirts made from synthetic materials (like polyester)? Answer: (b) Synthetic fibres are made from raw materials called…………. (iv) Nylon It causes environmental pollution. Hence, it became very popular for making clothes. Synthetic fibres are used in the manufacture of a variety of household articles such as ropes, buckets, furniture, containers, etc. We must take a cotton carry bag or a jute bag while shopping. Thermoplastic materials are made of polymers which are linked by intermolecular forces, forming linear or branched structures. How is rayon made? (e) Bakelite is a thermosetting plastic which is a poor conductor of heat and electricity. Acrylic is a synthetic fibre which appears to resemble wool. It is also used to … (A) Melamine It is a special plastic on which oil and water do not stick. Question 10. The synthetic material which can be used for marking fabrics as well as shatterproof bottles and jars is: Why are thermoplastics not used for making frying pan handles? The handle and bristles of a toothbrush should be made of different type of plastic material. Question 15. Polyester is the synthetic fibre which contains the organic group similar-to those which give fruits their sweet smell. 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. It is used for making bottles and utensils which is replacing materials like glass. D. C and D D. acrylic 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. It is a synthetic fibre which appears to resemble wool. A. nylon Question 32. Frying pan handles are made with thermosetting plastics which are resistant to fire and can tolerate heat better than other plastics. Economical, versatile polyvinyl chloride (PVC, or vinyl) is used in a variety of applications in the building and construction, health care, electronics, automobile and other sectors, in products ranging from piping and siding, blood bags and tubing, to wire and cable insulation, windshield system components and more. Answer: These are made by the reaction of phenol and formaldehyde in basic medium. For example, polycot is a mixture of polyester and cotton. We must develop the habits which are environment friendly. It is also used for making uniforms of fire-men. Question 34. 3 Polyethylene (PE), 4 polyvinyl chloride (PVC), 5 epoxy resin, and phenolic foams 6 were prepared in the 1940s. We must develop the habits which are environment friendly. Bakelite is a thermosetting plastic. Question 67. It is used to make electrical switches and handles of utensils. PET is a very familiar form of polyester. Is it thermoplastic or thermosetting plastic? [NCERT] 1. Thermosetting polymers, once moulded, cannot be softened when heated. A. Teflon Hence, it is suitable for making dress material. The properties of Bakelite are studied to get information regarding its commercial usage. It takes several years for plastic to decompose. For example, polythene and PVC are thermoplastics. It was also used in other diverse products such as jewellery, kitchenware, and toys. (a) Melamine is a thermosetting plastic which is resistant to fire and can tolerate heat better than other plastics. Rayon is obtained by the chemical treatment of wood pulp or cellulose. It is used to make electrical switches and handles of utensils. For example, Bakelite is a thermosetting plastic which is a poor conductor of heat and electricity. State the characteristics of synthetic fibres. It is used for making parachutes and rock climbing ropes. (a) for making uniforms of fire-men fire resistant? Some fibres are stronger than the others. For example, cotton is a natural polymer which is made from the cellulose. Answer: Rayon can be used in the following ways: Question 52 A. Plastics are used in the packaging of tablets, syringes, doctor’s gloves and a number of medical instruments. It is also used for making parachutes and ropes for rock climbing. C. rayon The arrangement of units in a plastic can be linear or cross-linked. Bakelite was invented in the early twentieth century but it is an important topic of study even in this 21st century. It is also used for making articles such as socks, ropes, tents, toothbrushes, car seat belts, sleeping bags and curtains. Answer: Plastic is non-biodegradable. CH2O)n. Its chemical name is “polyoxybenzylmethylenglycolanhydride”. As a result, they are not used for making frying pan handles. Hence, a polymer is made of many repeating units. Hence, it became very popular for making clothes. For example, polythene and PVC are thermoplastics. C. PVC A. nylon It is therefore, safe to keep food in plastic containers. It is the man-made fibre which is regarded as artificial silk. Answer: Water resistant. This is can be reduced by use paper or jute bag. Nylon is used in textile industry to produce clothes. Different substitutes of phenol and formaldehyde can also be used depending on the application. The synthetic polymer which can be used as a substitute for wool for making sweaters and shawls, etc. PET is used for making bottles, utensils, films and wires. Rayon is obtained by the chemical treatment of wood pulp or cellulose causing deforestation. The plastics which gets deformed easily on heating and can be bent easily are called thermoplastics. 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. Question 72. It has the ability to be very lustrous, semi lustrous or dull. Rayon is obtained by the chemical treatment of wood pulp or cellulose. A. nylon Which of the following plastic objects can be recycled? Plastics can take several years to decompose. (c) Used to make non- stick cookware View Answer. It is the man-made fibre which is regarded as artificial silk. Acrylic is used as a substitute of natural wool for knitting sweaters, blankets etc. Nylon is the first fully synthetic fibre. Phenol-Formaldehyde Resin (Bakelite). Answer: Plastic is a polymer like a synthetic fibre. It does not get completely burnt easily. Bakelite was used for many things when it first came to light. VIEW MORE. Plastic: All the plastic materials are organic polymers with a repeating unit called monomer. We must try to Reduce, Reuse, Recycle and recover the use of plastic items. They melt on heating. (A) Electric socket Frying pan handles are made with thermosetting plastics which are resistant to fire and can tolerate heat better than other plastics. Acrylic is the synthetic fibre feels like wool and used as a substitute for wool. 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