properties of plastics class 8
*Class:- 8 *Sub:- Science *Question 1* List and explain four properties of plastics? PLASTIC 1. Plastics may be amorphous solids, crystalline solids, or semicrystalline solids (crystallites) or any other form of solids. 10.Name the plastic, which deformed easily on heating and can be bent easily. Students who are in Class 8 or preparing for any exam which is based on Class 8 Science can refer NCERT Science Book for their preparation. A) It is non-reactive. Acrylic plastic is a polymer material that contains acrylic acid. MCQ quiz on Plastics multiple choice questions and answers on Plastics MCQ questions quiz on Plastics objectives questions with answer test pdf. Melamine plastic is used in the uniforms of firemen which make them flame resistant. Characteristic properties of plastics: 1. Class 8 Science Plastics Notes and Important Points Plastics Any Synthetic material which can be easily moulded into any desired shape on heating is called plastic.Plastic is also a polymer like the synthetic fibres.There are two types of arrangement in plastics linear and cross linked. Synthetic fibres … All operations like drilling ,sawing, punching can be done on plastics. Your email address will not be published. There is no maintenance cost for plastic articles i.e., they do not need painting and polishing. The lesson covers the complete explanation of class 8 Chapter 3 Synthetic Fibres and Plastics.Topics covered are Introduction to fibres, kinds of fibres. The NCERT Solutions for Class 8 science chapter 3 contains all the information about NCERT Solutions for Class 8 Science Chapter 3 Synthetic Fibres and plastics. 6. NCERT Solutions Class 8 Science; Plastics. 11. Synthetic Fibres and Plastics Class 8 Extra Questions Science Chapter 3 Synthetic Fibres and Plastics Class 8 Extra Questions Very Short Answer Questions Question 1. Plastic uses in various fields. Living Science Solutions for Class 8 Science Chapter 3 Synthetic Fibres And Plastics are provided here with simple step-by-step explanations. Question 10 Write 1 characteristics of teflon? 8.Plastics arrangement is _____ (a)Linear (b)Cross linked (c)Linear as well as cross linked (d)None of these. *Question 2* List three steps you can take to reduce the danger that plastic pose to the environment? Plastic has light weight, lower price, good strength and easy handling. To understand the properties of material explore the article! Plastics come from polymers, hence all plastics are polymers, but not all polymers are plastic. Teflon is a special plastic on which oil and water does not stick because it has slippery surface.It can withstand high temperature. Oil and Water do not stick on a plastic called Teflon,So Teflon coating is used in utensils FireProof Melamine Plastics do not catch fire easily So they are used to make uniform of fireman which makes them flame resistant Disadvantages of Using Plastics Plastics are Non Biodegradable They do not get easily decomposed by natural processes 9._____ can be recycled, reused, melted and rolled into sheets. ... We can modify the chemistry of the material to provide specific beneficial properties for its end use, including the option to make it softer, harder, malleable, or durable. Last Updated on September 29, 2020 By Mrs Shilpi Nagpal 3 Comments. With its properties, acetal plastics are present in various industrial applications, and it comes in different colors and grades. (a)Polyster (b)Plastics (c)Both of these (d) None of these. Chemical Properties of Plastic. Polymer: The term polymer id derived from two greek words POLY meaning many and MER meaning units.Therefore polymer refers to combination of repeating units. 5. The plastics posses excellent electric insulating properties. Plastics generally possess sufficient durability, provided they offer sufficient surface … Polyethylene Terephthalate (PET or PETE or Polyester) PET is also known as a wrinkle-free fiber. The lesson covers the complete explanation of class 8 Chapter 4 Metals and Non Metals.Topics covered are Introduction to metals, physical and chemical properties of metals. 7. 3. Give one use of plastics linked to each of these properties? It is non-reactive; Plastic is a poor conductor. Question 2 Give few examples of plastics? Plastics are also polymers.They consist of very long molecules made by joining many small molecules together. 9. Pupils investigate the properties of plastics then find solutions to problems caused by plastic waste globally An exciting challenge for pupils aged 8-14 years to develop solutions to the problems caused by plastic waste globally. Answer: Cotton Question 2. 16. The plastics industry is a significant contributor to the global economy. 8. They are light weight, smooth and soft than any other fibre. 4. In general different properties of materials are enlisted below. Metals and Non Metals Class 8 Science Chapter 4 as per NCERT Book used in CBSE and other Schools. Different types of synthetic fibres like, Rayon fibres, Nylon fibres, Polyester fibres and Acrylic fibres have been explained. Cotton is a natural polymer known as cellulose which is composed of large number of glucose units. Answer: Protein Question 3. Synthetic fibres possess following unique characteristics: They are durable and inexpensive. It is used for making floor tiles,unbreakable kitchenware,ashtray and fire resistant fabric. Bakelite:It is a very hard and tough plastic.It is a poor conductor of heat and electricity. Question 4 Give few use of polyvinyl chloride? Properties of plastics vary depending on the chemical composition, arrangements and the processing method of its subunits. The challenge can be used flexibly as part of the formal science and design and technology curriculum in the UK, […] Also, you may want to use our Plastic Material Selection Guide or Interactive Thermoplastics Triangle to assist with the material selection process based on your application requirements. Materials are most of all the objects and therefore materials have its own properties. Question 8. Durability. The plastics that act as insulators mostly have a high dielectric strength. Polythene:It is a plastic obtained by the polymerisation of a chemical compound known as ethene.It is tough and durable.It is used in making polythene bags,waterproof plastic sheets, bottles,buckets,dustbins. Professionals, Teachers, Students and Kids Trivia Quizzes to test your knowledge on the subject. ... NCERT Solutions for Class 8 Science Chapter 3 – 5 Mark Questions and Answers. Synthetic Fibres and Plastics. Prepared by :- MOHAMMAD SIDDIQ SALIM III SEM - II YR B-arch POORNIMA UNIVERSITY, jaipur 2. They are poor conductors of heat and electricity. Characteristics properties of plastics. Question 9 Write 2 characteristics of melamine? Apply coupon WELCOME21 at checkout and avail 21% discount on your order. It’s … Synthetic Fibres and Plastics Class 8 Science Chapter 3 - Synthetic Fibres and their Properties. A plastic is a synthetic material which can be moulded or set into desired shape when soft and then hardened to produce a durable article. Melamine is a plastic which can tolerate heat better than other plastics and resist fire.  DUCTILITY. (a)Thermoplastics (b)Thermosetting The plastics are not ductile and hence they fail without giving warning. This strong and transparent plastic is a popular choice for light fixtures, beverage dispensers, and dishes. 8. Plastic is strong, light and durable. Plastic is a synthetic material made from a wide range of organic polymers such as polyethylene, PVC, nylon, etc., that can be moulded into shape while soft, and then set into a rigid or slightly elastic form. Polyvinyl chloride:It is a strong and hard plastic.It is not as flexible as polythene.It is used for making insulation for electric wires,pipes,garden hoses,raincoats,seat cover etc. Synthetic fibres are those which are man-made and are obtained by the combination of different types of chemical substance and raw materials such as petrochemicals. Dismiss, 1.1 Agricultural Practices and Cropping Pattern, 1.01 Agricultural Practices and Cropping Pattern, 1.06 Protection from Weeds and Harvesting, 1.07 Storage of Foodgrains and Food From Animals, Chapter 1 Crop Production and Management - Test, 2.1 Microorganisms: Classification and Habitat, 2.01 Microorganisms: Classification and Habitat, 2.04 Food Preservation and Food Poisoning, 2.05 Nitrogen Fixation and Nitrogen Cycle, Chapter 2 Microorganisms Friend and Foe - Test, 3.1 Synthetic Fibres and their properties, 3.01 Synthetic fibres and their properties, Chapter 3 Synthetic Fibres and Plastics - Test, 7.01 Physical Properties of Metals and Nonmetals, 4.01 Physical Properties of Metals and Nonmetals, 7.02 Chemical Properties of Metals and nonmetals: Reaction with Oxygen and Water, 4.02 Chemical Properties of Metals and Nonmetals: Reaction with Oxygen and Water, 7.03 Chemical Properties of Metals and Nonmetals: Reaction with Acids and Bases, and Displacement Reaction, 4.03 Chemical Properties of Metals and Nonmetals: Reaction with Acids and Bases, and Displacement Reaction, Chapter 4 Materials: Metals and Nonmetals - Test, 10.2 Types of Combustion Reaction, Ignition Temperature and Fire Control, 6.02 Types of Combustion Reaction, Ignition Temperature and Fire Control, 6.3 Conservation of Forest and Wildlife: Wildlife Sanctuary and Biosphere Reserve, 7.03 Conservation of Forest and Wildlife: Wildlife Sanctuary and Biosphere Reserve, 6.4 Conservation of Forest and Wildlife: National Park, 7.04 Conservation of Forest and Wildlife: National Park, 7.05 Recycling of Paper and Reforestation, Chapter 7 Conservation of Plants and Animals - Test, 11.2 Variety in Cell Number, Shape and Size, 8.02 Variety in Cell Number, Shape and Size, 10.01 Structure, Function and Parts of Cell: Basic Components, 8.03 Structure, Function and Parts of Cell: Basic Components, 10.02 Structure, Function and Parts of Cell: Other Components and Comparison of Plant and Animal cells, 8.04 Structure, Function and Parts of Cell: Other Components and Comparison of Plant and Animal cells, Chapter 8 Cell - Structure and Functions - Test, 12.2 Sexual Reproduction: Reproductive System, 9.02 Sexual Reproduction: Reproductive System, 13.1 Adolescence, Puberty and Reproductive Phase of Life, 10.01 Adolescence, Puberty and Reproductive Phase of Life, Chapter 10 Reaching The Age Of Adolescence - Test, 3.05 Pressure exerted by Gases and Atmospheric Pressure, 11.07 Pressure exerted by Gases and Atmospheric Pressure, 8.3 Increasing and Decreasing the Friction, 12.03 Increasing And Decreasing The Friction, 9.4 Amplitude, Time Period And Frequency of Vibration, 13.04 Amplitude, Time Period And Frequency of Vibration, 14.02 Chemical Effect of Electric Current, Chapter 14 Chemical Effects of Electric Current - Test, 15.1 Electric Charge: Nature, Types and Transfer, 15.01 Electric Charge: Nature, Types and Transfer, 16.3 Multiple Images, Kaleidoscope and Dispersion, 16.03 Multiple Images, Kaleidoscope and Dispersion. Depending on physical properties, plastics are divided into two types: Thermoplastic and thermosetting. Hurry! Name a natural fibre. Which of the following properties of plastic makes it most convenient for use? 16.6 Can a Visually Challenged Persons Read and Write? Author of this website, Mrs Shilpi Nagpal is MSc (Hons, Chemistry) and BSc (Hons, Chemistry) from Delhi University, B.Ed (I. P. University) and has many years of experience in teaching.
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