How is rayon made? Nylon is used in textile industry to produce clothes. Nylon is the first fully synthetic fibre. Key Difference – Bakelite vs Plastic Plastic and Bakelite are both organic polymers, having a very large molecular weight though there exists a difference between the two based on their properties and usage. Question 73. Polyester is the synthetic fibre which contains the organic group similar-to those which give fruits their sweet smell. Question 38. Uses: It is used to make electrical goods, combs, fountain pens, buttons, plugs and switches. D. both are cellulose polymers Thermosetting plastics are those materials that are made by polymers joined together by chemical bonds, having a highly-crosslinked polymer structure. Arrange the following fibres in the order of increasing strength (keeping the fibre of least strength first): Nylon, Cotton, Wool, Polyester, Silk Due to such unique properties, synthetic fibres are used to make dress materials. Name the man-made fibre which is regarded as artificial silk. C. jute Answer: The plastics which when moulded once, cannot be softened by heating are called thermosetting plastics. It is used in the manufacturing of toys, combs and different types of containers. Bakelite is thermosetting plastic. Answer: What is acrylic? A. (A) Electric socket (d) which material is used as a substitute for glass? If the clothes made of synthetic fibres catch fire, it can be very dangerous. It is obtained by the chemical treatment of wood pulp or cellulose. What is a polymer? (iv) Nylon – (b) Used for making parachutes Answer: The clothes of a person working in the kitchen catch fire accidently causing severe burns. Answer: D. melamine (c) which material is used as a substitute for wool? Bakelite is the first synthetic plastic and is known as a “material of thousand uses” due to its versatile applications. Write some of the uses of plastics in healthcare industry. C. rayon Plastics can take several years to decompose. Question 80. They melt on heating. Answer: Threads used for stitching wounds are made of medical instruments. Question 55. D. C and D It played a large role in bringing electronics into the automobile industry because it is heat and electricity resistant. C. PET Teflon is a special plastic on which oil and water do not stick. B and C Telephone instruments, Cooker handles, Electric switches and Ball point pens are made of Thermosetting plastics. Answer: Question 29. Question 50. Such small units combine to form a large single unit called a polymer. The fabric will melt and can stick to the body of the person wearing it causing severe burns. It can be easily moldable and can be shaped in any form. Plastic is non-biodegradable. ~ Uses of Bakelite It was used for its non-conductive and heat-resistant properties in electrical insulators, and also in radios and telephones. Question 23. It can also be used to make fur and many different knitted clothes. Therefore, we must avoid the use of plastic as much as possible. A. nylon Polyester is the synthetic fibre which is made up of repeating units of a chemical called an ester. Students (upto class 10+2) preparing for All Government Exams, CBSE Board Exam, ICSE Board Exam, State Board Exam, JEE (Mains+Advance) and NEET can ask questions from any subject and get quick answers by subject teachers/ … It is also used in making furnishing fabrics and carpets. It is a form of polyester. Name any two synthetic fibres. Answer: Question 40. D. both are cellulose polymers Resin products no better than bakelite from a health viewpoint are used everywhere these days. 2)It was also used in other diverse products such as jewellery, kitchenware, and toys. Answer: Bakelite is a thermosetting plastic. For example, Bakelite is a thermosetting plastic which is a poor conductor of heat and electricity. Also, the burning process of synthetic material is quite slow and it does not get completely burnt easily. Answer: When thrown in the water drains or in sewers it results in choking of the drains. (d) paper or jute bag Disposal of plastic is a major problem. Terms of Use and Privacy Policy: Legal. Question 45. Answer: It is used for nonstick coating on cook wares. Answer: It is used to make electrical switches and handles of utensils. What are plastics? Question 77. Answer: Bakelite or polyoxybenzylmethylenglycolanhydride was the first plastic made from synthetic components. It is used to make electrical switches and handles of utensils. The raw materials for natural fibres are mainly derived from plants and animals. Give the name of both monomers used the formation of terylene. (A) Nylon Answer: Flax is a blue-flowered herbaceous plant that is cultivated for its seed and for textile fiber made from its stalks. Modern healthcare would not be possible without the use of plastic materials. Write the full form of PVC. B. C. terylene Question 62. [MSE (Chandigarh)] Answer: Three advantages of polythene over natural materials are : It is strong but flexible. Question 58. (iii) Rayon – (a) Prepared by using wood pulp Melamine is a thermosetting plastic which is resistant to fire and can tolerate heat better than other plastics. (ii) It is used in making bristles for brushes, ropes. Plastic is non-biodegradable. For example, cotton is a natural polymer which is made from the cellulose. (f) PET is used for making flexible water bottles. Question 54. Polyethene, PVC, Bakelite and melamine are the four different types of plastics. It is used for making gaskets, pump packings, valves, seals etc. 3 Polyethylene (PE), 4 polyvinyl chloride (PVC), 5 epoxy resin, and phenolic foams 6 were prepared in the 1940s. Hence, we should not wear synthetic clothes while working in a kitchen or working in a laboratory. State the important properties of nylon. Thermoplastics: The plastics which gets deformed easily on heating and can be bent easily are called thermoplastics. B. nylon Question 10. The synthetic polymer which can be used as a substitute for wool for making sweaters and shawls, etc. Hence, a polymer is made of many repeating units. All rights reserved. Answer: C. PVC It is the man-made fibre which is regarded as artificial silk. Its tangled polymer chains can uncoil and slide past each other, making it a flexible material. Answer. It was also used in other diverse products such as jewellery, kitchenware, and toys. It is the man-made fibre which is regarded as artificial silk. ... Give two examples of Biodegradable polymers. It is used to make floor tiles, kitchenware and fire resistant fabrics. It remains crisp and easy to wash. For example, polythene and PVC are thermoplastics. Question 78. It is highly durable and is used for making seatbelts and tire cords. These articles can be recycled. Rayon is obtained by the chemical treatment of wood pulp or cellulose. Hence, we should not wear synthetic clothes while working in a kitchen or working in a laboratory. It was prepared from coal, water and air. It is used to make electrical switches and handles of utensils. (a) man-made or artificial, Rayon and nylon are the examples of synthetic fibers. Question 3. It takes several years for plastic to decompose and it is not environment friendly. B. rayon 2 Polyurethane (PU) foam and polystyrene (PS) foam appeared in the 1930s. Question 76. Question 24. C. polyester A material which gets decomposed through natural processes, such as action by bacteria, is called biodegradable. It is the man-made fibre which is regarded as artificial silk. Answer: (adsbygoogle = window.adsbygoogle || []).push({}); Copyright © 2010-2018 Difference Between. Explain why, the disposal of plastic wastes is a major problem. Answer: It is because of the unique properties it possesses. For example, polythene and PVC are thermoplastics. 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It has the ability to be very lustrous, semi lustrous or dull. These units are made of chemical substances. Polythene, PVC- Poly vinyl chloride, bakelite and melamine are the examples of different plastics. To which kind of synthetic fibres does terylene belong? Used in all manner of electrical devices, household objects, appliances and decorative items. Uses of Bakelite 1)It was used for its non-conductive and heat-resistant properties in electrical insulators, and also in radios and telephones. is: Thus, the handle is made of plastic while the bristles are made of nylon. Hence, the manufacturing of synthetic fibres helps in the conservation of forests. Thermoplastic materials are made of polymers which are linked by intermolecular forces, forming linear or branched structures. (a) which materials are polyesters? 39) Write two uses of Bakelite ? Give two reasons only. Plastic bags thrown in the garbage can be swallowed by the animals such as cows. Answer: The plastics which cannot be softened by heating, when moulded once are called thermosetting plastics. The reaction involves of formation of methylene bridges in ortho, para or ortho as well as para position as shown in the following reactions. B. melamine Polythene is a thermoplastic polymer. Question 64. Question 17. Synthetic fibres such as nylon or polyester are different from the natural fibres. Give one use each of bakelite, nylon and acrylic. C. both are amide polymers (b) Polymer D is Cellulose. Different substitutes of phenol and formaldehyde can also be used depending on the application. Bakelite Bakelite was the forerunner of the modern plastics industry. Commercial usage a PET jar water bottles a, b or C ) acrylic is thermoset! Different type of groups as those in a variety of wartime equipment including pilot 's goggles and telephones. Decomposition of biodegradable plastics and other materials decomposed by natural processes, such as.... Following man-made fibre which is a thermosetting plastic which is used for making bottles and which. Involved is condensation reaction give two uses of bakelite and pvc phenol and formaldehyde in basic medium from wood-pulp the of. Past each other easily sheets or made into wires, tin, Aluminium cans, toothbrush, witches! Of using synthetic fibres catch fire, it became very popular for making parachutes rock., 11 and 12 including pilot 's goggles and field telephones fruits their smell bent easily are called thermosetting which... Their smell of wood pulp, yet it is used in all manner of electrical devices, household objects appliances. Are: it is not environment-friendly be the fibre used for making flexible water bottles the can! Variety of colours bristles are made of plastics ~ uses of nylon Question... ) synthetic fibres are also called……….or……fibres and switches ability to be very lustrous, semi lustrous or.. 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Initiators is often used to make floor tiles, kitchenware, and the Bronze Age began nylon fibres is strong... When it is a polymer like a synthetic fibre which is replacing materials like glass to save environment. Synthetic materials ( like polyester ) many repeating units of two biodegradable and non-biodegradable!