Linen. Thus, the correct answer is option A. Thousands of monomers are coupled together by poly-addition (e.g. The nylon fiber consists of a very long chain of polyamide molecules. Glassfibre and mineral wool have been used for many decades. It is used for making goods like toys, combs, containers, etc. Chapter 3 Synthetic Fibre Objective Questions . Which of the following is not a synthetic fibre? Cotton is a soft, fluffy staple fibre that grows in a boll, or protective capsule, around the seeds of cotton plants. Terylene is an example of polyester polymers. Additionally it is wrinkle and mildew resistant – properties that most common natural fibres do not have. Which synthetic fibre is called artificial silk? Nylon is an example of polyamide polymers. A. Lycra. It is prepared by the polymerization of amide molecules. Socks. Dear STudent, your question is incomplete, you have not provided options. Mineral fiber (like asbestos). 3. (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. This fiber was created as a wool substitute and is soft, warm, resilient and great for making lightweight blankets? ‘Manufacturing synthetic fibres is actually helping conservation of forests’. Synthetic fibres are not suitable for hot and humid weather as they do not absorb sweat whereas cotton clothes do. Synthetic Fibres and Plastics - Chapter Wise CBSE Solved Question and Answer Based On NCERT. Multiple Choice Questions (MCQs) Which of the following is not a man-made material? Question 63. Question 3. Fiber produced from these polymers includes nylon, polyesters, acrylics, polyurethanes, etc. Do you agree, if yes comment how? Polyester synthetic fibre is durable and resistant to shrinkage and stretch. Question 5. 4. Natural fibres may be of plant or animal origin. B. Rayon. ( Inme se Kya nylon se bna hua nhi hota.) another synthetic fibre C is made of a polymer D which consists of a number of glucose units joined one after the other. Also write the false statements in their correct form. On the down side, however, along the petrochemical origin, polyester fabrics have a “plastic” handle. Explain the difference between thermoplastic and thermosetting plastics. (ii) Synthetic fibres do not melt on heating. Synthetic fibers have very low levels of absorbency. 25. Toothbrush. The amide molecules are obtained from petroleum products by complex chemical process. Which of the following is synthetic fibre? Wool. This list may not reflect recent changes (). Pick the synthetic fibre out of the following? Synthetic Fibres and Plastics Class 8 MCQs Questions with Answers. 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. 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. 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. Synthetic Fibres & Plastics. Ropes. Cotton. Question 4. Synthetic fibers. Plant fibres include epidermal trichomes, such as cotton, and other fibrous tissues of plants, such as phloem fibres (e.g. View Answer. 9.No dust or impuritites contain in synthetic fiber. C. Thermosets. During summers, synthetic fibres do not absorb sweat and a person wearing it feels uncomfortable. Synthetic fibers are made of polymers that do not occur naturally, and are produced entirely in the laboratory, most generally from petroleum byproducts. It is a superior type of synthetic fiber, which is truly artificial, as it does not use any natural fiber as its raw material. polyester) process. (a) Which fibre could be … Nylon and terylene are produced through condensation polymerisation. Which one of the following is not a synthetic fiber. Silk. I. polypropylene) or poly-condensation (e.g. 10.It is easy to change in fiber structure. 11.It grows with its natural color. Answer: Synthetic fibres dry up soon, are durable, less expensive, readily available and easy to maintain. Long Q&A: Q1: “Minimise use of plastics for healthy environment”, comment on this advice. Write the importance of synthetic polymers in our life. Cotton is used in the manufacturing of bedsheets and usually used in summers as it keeps us ventilated. 12.It contains natural crimp. Wool is a natural fibre obtained from the body of many animals. Much of the international literature refers to SMF as 'Man Made Mineral Fibres' (MMMF). Car seat belts. 25. The synthetic fibre A is chemically a polyamide whereas the synthetic fibre B contains a large number of ester groups. Which of the following is a bad conductor of electricity? Explain why plastic containers are favoured for storing food. Answer: (D) Thermoplastics. Identify the product based on the given features. 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. This includes the following fibres-Protein fibers like (wool and silk) Cellulose fibers (like cotton and linen). (Inme se konsa Synthetic fibre hei?) Synthetic fibers are formed by polymerization process of one or more than one monomer. Polyester fabrics have a “ plastic ” handle amide molecules are obtained from these animals are utilised for the of... 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