Synthetic fibres and plastics questions
Web6 rows · Answer: Synthetic fibres and plastics are made up of very large units called polymers, and ... WebImportant Questions Class 8 Science Chapter 3 – Synthetic Fibres and Plastics Science as a subject plays a vital role in a student’s academic life. Class 8 is one of the stepping stones for the students; therefore, learning the basics of Science and comprehending the theory and concepts introduced in the chapters is essential.
Synthetic fibres and plastics questions
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Web4. Give three advantages of polythene over natural materials. 5. Explain why plastic containers are favored for storing food? 6. Explain why Electric plugs/switches/plug boards are made of thermosetting plastics? 7. Give examples to show that plastics are noncorrosive in nature. 8. WebJan 6, 2024 · Synthetic fibers are made of polymers. The word polymer refers to a chemical substance composed of molecules that form long repeating chains, a characteristic that is useful in synthetic fibers ...
WebSynthetic fibres, like natural fibres, are difficult to colour. These fibres burn more rapidly than natural fibres. They are susceptible to heat damage and rapidly melt. Many animals die after consuming plastic materials. When plastic is burned, it emits harmful gases. Q7. … WebQuestion 1. Explain why some fibres are called synthetic. Answer: Some fibres are called synthetic fibres because they are made by man using chemicals. Question 2. Mark ( ) the correct answer. Rayon is different from synthetic fibres because. (a) it has a silk-like appearance. (b) it is obtained from wood pulp.
WebFeb 24, 2024 · 1. Substance used as synthetic wool (7) 2. A plastic used for making containers and carry bags (9) 3. Substance made up of large number of smaller molecules (7) 4. Another name for this compound is artificial silk (5) Down. 5. A type of fibre … WebStudy Synthetic Fibres and Plastics Class Fill in the Blanks questions prepared by experts at TopperLearning. Visit our website to stay up to date for your test on Synthetic Fibres and Plastics! ... You can move between questions and answer them in any order you like. Click on "End Test" when you are done. These tests are unlimited in nature ...
WebFeb 24, 2024 · Here we have covered Important Questions on Synthetic Fibres and Plastics for Class 8 Science subject. Science Important Questions Class 8 are given below. Multiple Choice Questions Pick the synthetic fibre out of the following? (a) Cotton (b) Nylon (c) Jute (d) Wool Which of the following is a source of rayon? (a) Wool (b) PET (c) Wood pulp
WebPET is one of the familiar form of polyesters and it is used for making utensils, bottles, films, wires, and many other useful products. Polyester (Poly + ester) is made up of the repeating units of a chemical known as an ester. Plastic is also a sort of polymer like the synthetic … trench coat fitWebMost of the synthetic fibres are made from compounds that form long polymer strands, e.g., nylon and dacron. A plastic is generally a synthetic polymer that can be melt processed. They can be molded. Polipalli SRINIVASA RAO. 4 y. Natural fibres : fibres from sources … trench coat femme noirWebJul 22, 2024 · Its full form is polyethylene terephthalate. 14. Name some uses of acrylic. Acrylic is a type of synthetic fibre used to make sweaters and shawls for keeping us warm. Acrylic is cheaper than natural wool and is available in a variety of colours. Hence, it is used to make winter clothes like sweaters and blankets. 15. tempestry project worksheetWeb【Upgrade Extension】The extension is made from new synthetic fiber that is thickness and less tangling. And the upgraded wire is thicker and more elastic, not easy to break and not cause any pressure on the scalp. ... Most Concerned Questions How to Adjust the Size？ Adjust size by putting the plastic hook into 5 different notches on each ... trench coat fivemWebA. The process of making yarn from fibres is called spinning. B. In this process, fibres from a mass of cotton wool are drawn out and twisted. C. A simple device used for spinning is a hand spindle, also called takli. D. Another hand operated device used … tempests and slaughter seriesWebHIGHER ORDER THINKING SKILLS QUESTIONSSYNTHETIC FIBRES AND PLASTICS. 1. Is nylon fibre so strong, that we can use it to make parachutes? 2. Give some uses of PET. 3. Why is melamine used for making kitchenware? 4. Give three advantages of polythene … tempestry project kitsWebOct 31, 2024 · Mark ( ) the correct answer. Rayon is different from synthetic fibres because. (a) it has a silk-like appearance. (b) it is obtained from wood pulp. (c) its fibres can also be woven like those of natural fibres. Answer: (b) It is obtained from wood pulp. Question 3. Fill in the blanks with appropriate words. tempest schematics