Share 0. Give the characteristics of synthetic fibres. Wool. The fabric is washed easily, and dries quickly. Sling manufacturers may use as many turns as they need and may use as many pieces as they like by using a simple join, often made with a basic … Do you agree, if yes comment how? Terylene is an example of polyester polymers. Write the importance of synthetic polymers in our life. Synthetic fibers are more in length and are long lasting. Synthetic Fibres and Plastics Class 8 MCQs Questions with Answers. Cotton is a soft, fluffy staple fibre that grows in a boll, or protective capsule, around the seeds of cotton plants. Plant fibres include epidermal trichomes, such as cotton, and other fibrous tissues of plants, such as phloem fibres (e.g. (iii) It is risky to wear synthetic clothes while working in … 25. Which synthetic fibre is called artificial silk? kindly match the query from below description- Synthetic fibres are those fibres which have been made artificially, using chemicals. Pick the synthetic fibre out of the following? Wool. Wool is a natural fibre obtained from the body of many animals. Explain why plastic containers are favoured for storing food. It is a man-made product. Which of the following is not a synthetic fibre Share with your friends. The following properties pertain to which fiber: high elongation,affected by sunlight, low absorbency, and high elastic recovery. View Answer Q2: Increasing application of synthetic fibres is actually helping in conservation of forests. Manufactured polymers (synthetic fibres) Manufactured polymers, also known as synthetic fibres, are made from synthetic sources, such as oil, coal or petrochemicals. The most common synthetic fiber used in textiles. Polyester and nylon are the examples of synthetic fibre. 11.Colors are added in the solution bath as required. Mineral fiber (like asbestos). Car seat belts. Another group of man-made fibres (and by far the larger group) is the synthetic fibres. Page No 32: Question 1: Why do we wear clothes? Pages in category "Synthetic fibers" The following 69 pages are in this category, out of 69 total. Cotton cloth absorbs water efficiently and burns at a moderate speed. Multiple Choice Questions (MCQs) Which of the following is not a man-made material? polypropylene) or poly-condensation (e.g. Long Q&A: Q1: “Minimise use of plastics for healthy environment”, comment on this advice. Which one of the following is not a synthetic fiber. Cotton is used in the manufacturing of bedsheets and usually used in summers as it keeps us ventilated. (a)polyester (b)nylon (c)acrylic (d)silk 2 See answers nitya67 nitya67 Silk is not a synthetic fibre mariospartan mariospartan Answer: Silk is not a synthetic fiber. It is a superior type of synthetic fiber, which is truly artificial, as it does not use any natural fiber as its raw material. Ropes. This includes the following fibres-Protein fibers like (wool and silk) Cellulose fibers (like cotton and linen). Polyester synthetic fibre is durable and resistant to shrinkage and stretch. ( Inme se Kya nylon se bna hua nhi hota.) On the down side, however, along the petrochemical origin, polyester fabrics have a “plastic” handle. Synthetic fibres are made of polymers that do not occur naturally but instead are produced entirely in the chemical plant or laboratory, almost always from by-products of petroleum or natural gas. 25. 11.It grows with its natural color. The synthetic fibre A is chemically a polyamide whereas the synthetic fibre B contains a large asked Jun 20 in Chemistry by BhratJha ( 44.3k points) synthetic fibers and plastics another synthetic fibre C is made of a polymer D which consists of a number of glucose units joined one after the other. Question 1. Which of the following is not made up off nylon. Q14. The structure of synthetic polymers depends on manufacturing processes and the character and origin of monomer. B. Rayon. nylon . Thousands of monomers are coupled together by poly-addition (e.g. 12.Crimp is applied on filament after passing spinneret : 13.Most of the fibers are hydrophilic in nature. Answer: Synthetic fibres dry up soon, are durable, less expensive, readily available and easy to maintain. The amide molecules are obtained from petroleum products by complex chemical process. Free Question Bank for 8th Class Science Synthetic Fibers and Plastics Synthetic Fibres and Plastics Explain the difference between thermoplastic and thermosetting plastics. 5. Wool and silk. cellulose that is chemically altered to create an entirely new compound not found in nature. (i) Natural fibres — Cotton (ii) Man-made or synthetic fibres — Nylon (iii) Mixed fibres — Terycot 3. Much of the international literature refers to SMF as 'Man Made Mineral Fibres' (MMMF). 4. Polyamides and polyesters are two groups of synthetic fibres with high strength, not easily stretched and used as textile. Which of the following is a bad conductor of electricity? Socks. During summers, synthetic fibres do not absorb sweat and a person wearing it feels uncomfortable. Silk. Choose the correct option in the following questions: Question 1. Nylon is an example of polyamide polymers. Raw materials for preparation of synthetic fibres are (a) coal (b) petroleum (c) natural gas (d) all of these. Which of the following groups contain only synthetic fibres? Glassfibre and mineral wool have been used for many decades. Indicate whether the following statements are True or False. (a) Plastic (b) Wood (c) Cement (d) Nylon. A synthetic fiber is shiny and silky, while natural fibers are always dull and rough. Which of the following is synthetic fibre? This means cutting a lot of trees, which leads to deforestation. The synthetic fibre A is chemically a polyamide whereas the synthetic fibre B contains a large number of ester groups. None of the answers are correct; there's no real difference between synthetic and natural fibers. Regenerated fibers are formed from natural polymer through a … Yak, sheep, camel, goat are the common animals which produce fur on their body which can be obtained and used in the production of wool. The nylon fiber consists of a very long chain of polyamide molecules. Page No 32: Question 9: Fibres are made from melted plastic by passing it through fine holes in a _____ Answer: Fibres are made from melted plastic by passing it through fine holes in a spinneret. True. The new Australian Standard AS4497:2018 requires that there are at least 11 turns of yarn. Protein fibers. Synthetic fibers are made of polymers that do not occur naturally, and are produced entirely in the laboratory, most generally from petroleum byproducts. The basic component of plant fibres is (a) protein (b) cellulose (c) starch (d) none of these. Answer: (b) Polymers can be both natural and synthetic. (a) Nylon (b) Cotton (c) Silk (d) Wood. 9.No dust or impuritites contain in synthetic fiber. (Inme se konsa Synthetic fibre hei?) Answer: (D) Thermoplastics. Question 14. Which of the following is known as artificial silk? The fibre is almost pure cellulose. Question 63. D. Thermoplastics. Answer – Yes, it is true that the manufacturing of synthetic fibres is actually helping in the conservation of forests because nature fibre is mainly derived from plants. Synthetic fibers are formed by polymerization process of one or more than one monomer. Question 4. True of False. Dear STudent, your question is incomplete, you have not provided options. animal fiber coming most often from sheep, but may be goat (mohair), rabbit (angora), camel, alpaca, llama . Fibres that are useful in wound management and healing include both natural and artificial or synthetic fibres. Synthetic fibres do not absorb water and as a result, they dry faster than cotton or wool. A blend of wool and kevlar, the synthetic fibre widely used in body armour, was lighter, cheaper and worked better in damp conditions than kevlar alone. (a) Polymers cannot form fibres (b) Polymers can be both natural and synthetic (c) Polymer is a natural substance (d) Polymer is a synthetic substance. (a) Cotton (b) Nylon (c) Jute (d) Wool Soln: Answer is (b) Nylon ... False- Synthetic fibres do not melt on heating. Chapter 3 Synthetic Fibre Objective Questions . Flax and Hemp). III. Nylon, the first synthetic fiber in the "fully synthetic" sense of that term, [citation needed] was developed by Wallace Carothers, an American researcher at the chemical firm DuPont in the 1930s. The natural fibres which are obtained from these animals are utilised for the production of wool. iii) True because synthetic clotes melts on exposure to heat iv) False- Plastics are non-biodegradable 26. Question 5. 4. Synthetic fibers have very low levels of absorbency. Natural fibres may be of plant or animal origin. You can refer to NCERT Solutions for Class 8 Science Chapter 3 Synthetic Fibres and Plastics to revise the concepts in the syllabus effectively and improve your chances of securing high marks in your board exams. Which of the following is not a synthetic fibre? Additionally it is wrinkle and mildew resistant – properties that most common natural fibres do not have. It has a linear arrangement of monomer units. Synthetic fibres are not suitable for hot and humid weather as they do not absorb sweat whereas cotton clothes do. Synthetic mineral fibres (SMF) is a generic term used to collectively describe a number of amorphous (non-crystalline) fibrous materials including glassfibre, mineral wool and ceramic fibre. Linen. plant fiber from the flax plant; fibers are longer, somewhat brittle. 3. A. Nylon and terylene are produced through condensation polymerisation. Cellulose acetate. Synthetic fibers. acrylic. 2. This fiber was created as a wool substitute and is soft, warm, resilient and great for making lightweight blankets? (a) Which fibre could be … Fiber produced from these polymers includes nylon, polyesters, acrylics, polyurethanes, etc. Identify the product based on the given features. 12.It contains natural crimp. The core consists of a continuous monofilament synthetic fibre yarn. (ii) Synthetic fibres do not melt on heating. The nylon fibers are elastic, strong and water resistant. One of the first synthetic fibers created was rayon in 1910, made by processing and spinning a sticky cellulose or wood pulp solution into a silk-like fiber. It is used for making goods like toys, combs, containers, etc. Rayon and acetate are both artificial fibers, but not truly synthetic, being made from wood. Synthetic Fibres & Plastics. I. answer choices . Nylon (a) Nylon is a general term given to the synthetic polymer made from two types of monomer, diamine … A. Lycra. Answer the following questions in short: 1. (i) The fabric terywool is obtained by mixing terylene and wool. 10.It is easy to change in fiber structure. Rayon. Explain why some fibres are called synthetic. Toothbrush. Cotton. This is helpful in the manufacturing of mats or carpets that are used at home for decoration. 1. so it is not synthetic. polyester) process. NCERT Solutions for Class 8 Science Chapter 3 – 5 Mark Questions and Answers. Question 3. This list may not reflect recent changes (). It is prepared by the polymerization of amide molecules. Synthetic Fibres and Plastics - Chapter Wise CBSE Solved Question and Answer Based On NCERT. Give examples which indicate that nylon fibres are very strong. Also write the false statements in their correct form. View Answer. That is why they are known as synthetic fibres. C. Thermosets. Comment. A. nylon B. flax C. acrylic D. polyester Answer: B. flax Flax is a blue-flowered herbaceous plant that is cultivated for its seed and for textile fiber made from its stalks. Jute) and pericyclic fibres (e.g. (a) Acrylic (b) Nylon (c) Polyester (d) Rayon. II. answer choices . Synthetic fibers are made from different chemicals, having their own properties. 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