Polythene is a polymer of ethene. 5. Question 13. Board – CBSE. Question 5. (b) 1964 True The synthetic fibres melt on heating. Coin a few more slogans of this kind. 12. Which of the following is known as artificial silk? Related Questions to study. We should not throw plastic wastes in water bodies. What are plastics? (a) layers However, similar behaviour with a more thermostable residue is shown by melamine cyanurate. Melamine cannot be melted for recycling like other plastics. Polyvinyl Chloride. (b) wrinkle free She donated these in a charity. Riya’s father got a transfer to another place. What is ester? 12. Polymers (c) PVC (b) straws While sorting out the things Riya found many of her clothes of various fabrics were not fitting her or worn-out. Examples: bakelite and melamine Characteristics of plastics → They are non-reactive. Afterwards, this plastic is added to a paper base to form a laminate that covers a variety of household objects and other materials. Melamine is rich in nitrogen, a property that is similar to protein. Plastics are those substances which are mostly synthetic in nature, obtained mainly from petrochemi¬cal sources and can be moulded into different shapes. 3. Answer: Artificial silk is another name for silk. It is used to make socks and stockings as it is elastic. Biodegradable, Question 17. Melamine was initially found in food stuffs exported to the USA in early 2007 contained in contaminated wheat gluten and rice protein and had resulted in the death of several pet dogs and cats. (c) Shoes Why is it advised not to wear synthetic clothes while working in a laboratory or working with fire in the kitchen? Rayon is a natural fibre. 11. 9. Melamine resin makes it very durable and shatter-resistant, making melamine products more desirable than other plastic housewares. True 13. (a) compact discs You may need consider between hundred or thousand products from many store. Write uses of melamine plastic. (d) PET, Question 12. 2. Polyester could be blended with natural fibres to enhance its properties. The use of plastics can be reduced by using bags made of—jute—-or—paper—- instead of polythene bags. Synthetic fibres do not absorb much ____________. (b) cross-linked arrangement of units in plastic. Question 1. Raw materials for preparation of synthetic fibres are obtained from substances like ____________, ____________ and ____________. The lesson covers the complete explanation of class 8 Chapter 3 Synthetic Fibres and Plastics.Topics covered are Introduction to fibres, kinds of fibres. Answer: Answer: Answer: Question 3. 14. Nylon is the strongest amongst all the synthetic fibres. (d) spinneret, Question 10. Which plastic will he use for coating and why ? PHYSICAL PROPERTIES OF MELAMINE Page in Marketizer.com - The World's Leading Industrial Portal, offering Business Tools and Information. Question 2. (c) jute (b) She thought of burning them to get rid of them. Melamine is categorized under Class #7 on the list of Plastic Resin Codes. (c) Rayon (b) molecules 6. Write some properties and uses of melamine. (a) (c) PVC (c) 10. Here you can read Chapter 3 of Class 8 … 6. rayon Which of the following are made from thermosetting plastic? The two uses of rayon are: Question 6. (h), IV. List the two ways in which synthetic fibres can be synthesised. In which country was rayon first time synthesised? Melamine is a name used both for the chemical and for the plastic made from it. 12. spinneret 2. 9. Answer: Answer: 5. (a) terylene (d) none of these, Question 14. Question 4. Rayon synthesised for the first time in England. 4. Question 11. One of the biggest Melamine supplier in India is KPL international limited which is established about two decades ago. Share with your friends. In which year was nylon made? Answer: Crockery Answer: 3.2 Types of Synthetic Fibers Rayon 3.3 Characteristics of Synthetic Fibers 3.4 Plastics 3.5 Plastics as […] Dear Student, Please refer the answer given by Nitesh. What are thermosetting plastics? Containers, buckets, bottles, chairs, baskets, etc. False It is therefore advised not to wear synthetic clothes while working in a laboratory or working with fire in the kitchen. Melamine and its salts are used as fire-retardant additives in paints, plastics, and paper. 5. (d) 10. cellulose, starch Give the name of a plastic used for making fibres. There are certain governmental and non-governmental organisations who educate the general public on how to make wise use of plastics and develop environment friendly habits. Uses of Nylon. Do it yourself. Answer: The government should ban the use of plastic bags. 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