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Synthetic Fibres And Plastics - Lecture 1 Video Lecture - Class 8

FAQs on Synthetic Fibres And Plastics - Lecture 1 Video Lecture - Class 8

1. What are synthetic fibres and plastics?
Ans. Synthetic fibres are man-made fibres that are produced through chemical processes. They are derived from synthetic polymers and can be used to make various textiles and materials. Plastics, on the other hand, are synthetic materials made from polymers that can be molded into different shapes and forms.
2. What are the advantages of using synthetic fibres?
Ans. Synthetic fibres have several advantages. They are usually strong and durable, making them suitable for long-lasting products. They are also resistant to wrinkles, shrinking, and fading. Synthetic fibres also tend to be less expensive compared to natural fibres. Additionally, they can be engineered to have specific properties such as being waterproof or flame-resistant.
3. What are some common examples of synthetic fibres?
Ans. Some common examples of synthetic fibres include polyester, nylon, acrylic, and spandex. Polyester is widely used in clothing, upholstery, and carpets. Nylon is known for its strength and is used in products like stockings, ropes, and parachutes. Acrylic is often used as a substitute for wool in fabrics, while spandex is used in stretchable clothing like swimsuits and sportswear.
4. How are plastics made?
Ans. Plastics are made through a process called polymerization. This involves chemically bonding together small molecules called monomers to form long chains called polymers. The monomers used in plastics can be derived from natural gas, coal, or petroleum. The polymers can then be molded, extruded, or shaped into various products.
5. What are the environmental concerns associated with synthetic fibres and plastics?
Ans. Synthetic fibres and plastics pose several environmental concerns. They are non-biodegradable, meaning they do not break down easily in the environment. This leads to accumulation in landfills and oceans, contributing to pollution. Additionally, the production of synthetic fibres and plastics requires the use of fossil fuels, which contributes to greenhouse gas emissions and climate change. Proper disposal and recycling of synthetic fibres and plastics are important to mitigate these environmental impacts.
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