If the cloth catches fire it can be very disastrous. Disadvantages of synthetic fibres: Examples – nylon, acrylic, rayon, etc. NCERT 8th Class (CBSE) Science: Synthetic Fibres and Plastics - Short and Long Answers, Multiple choice questions, Very Short Question Answer for NCERT 8th Class (CBSE) Science: Synthetic Fibres and Plastics - Synthetic fibres are made up of molecules called polymers. (i) Synthetic fibres are made of small units of chemicals joined together in the form of large chain. Rayon fibres. 4. Synthetic fibres melt before burning. What are the Advantages and Disadvantages of Synthetic Fibres Advantages of Synthetic Fibres Synthetic fibres have the following advantages.Most synthetic fibres have good elasticity. List two disadvantages of synthetic fibres. Filed Under: Class 8, Synthetic fibres and Plastics Tagged With: disposal of plastic waste, harmful effect of plastics About Mrs Shilpi Nagpal 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. Synthetic Fibres; Synthetic fibres are man-made. Shilpi Nagpal mam ☺, Your email address will not be published. Synthetic Fibre of Class 8 They easily melt and burn to form small sticky beads at a very high temperature. Soft Synthetic fibres are generally soft so they are used in clothing materials. Ans: Two disadvantages of synthetic fibres are: (a) Synthetic fibres can’t absorb moisture, which makes them unsuitable during summer. Required fields are marked *. View Answer Synthetic Fibres and Plastics, CBSE Science Class 8 Chapter Wise Solved Q&A. Polymer is a Greek word where ‘poly’ means many and the word ‘mer’ means units. Introduction of fibres. Students (upto class 10+2) preparing for All Government Exams, CBSE Board Exam, ICSE Board Exam, State Board Exam, JEE (Mains+Advance) and NEET can ask questions from any subject and get quick answers by subject teachers/ experts/mentors/students. Most fabrics made of synthetic fibres do not wrinkle easily. Question 15. Synthetic fibre is soft and shiny. It break down into very small pieces called microplastics which cause pollution to soil and water bodies such as rivers, lakes and oceans. The fabric melts and sticks to the body of the person wearing it. 2. Disadvantage of synthetic fibres 1)They melt on heating:If a person is wearing clothes made of synthetic fibres and his clothes catch fire accidentally,then the Synthetic fibres of clothes melt and stick to the body of the person causing severe burns. Ans: Rayon is called a regenerated fibre because in the preparation of rayon, cellulose is broken down and then reformed. Nov 23,2020 - are blended fibres are better than synthetic fibres | EduRev Class 8 Question is disucussed on EduRev Study Group by 129 Class 8 Students. List two disadvantages of synthetic fibres. Answer. We should not wear synthetic clothes while working in the kitchen or laboratory. Recall, people usually suggest not to wear nylon clothes in kitchen. Last Updated on September 29, 2020 By Mrs Shilpi Nagpal 2 Comments. Class 8 Science Synthetic Fibres and Plastics Chapter 3 (8/9) Disadvantages of Plastics Explanation in Hindi, Imp Questions and Answers. 1.Do not wrinkle easily and they keep their colour and brightness for a much longer time than natural fibres such as cotton. 9) To which kind of synthetic fibres does terylene belong ? DISADVANTAGES. They are generally cheaper than natural fibres. The chain formed is called as polymer. 4. Cellulose is made up of repeating units … Cotton is a natural fibre obtained from the cotton plant. Colour Varieties of colours are available as they are manufactured. Disposal of plastic waste is a major problem because: 1)The articles made of plastic are non-biodegradable.They do not decompose easily. Which of the following fibres is considered as the strongest natural fibre? The fabrics made from this are worm resi slant. ... - Synthetic fiber re burning ° Some electrical char e accumulates on the synthetic fibers. 2)The burning of plastic gives out harmful gases which pollute the air. 8) Which synthetic fibre feels like wood and used as a substitute for wool ? Fibres that are made using raw materials from ______ are synthetic fibres. Advantages of synthetic fibres: Disadvantage of synthetic fibers: 1.Do not wrinkle easily and they keep their colour and brightness for a much longer time than natural fibres such as cotton. Fabrics made of synthetic fibres are generally more durable, less expensive, and more readily available than those made of natural fibres… All other points are absolutely correct. This is actually a disadvantage with synthetic fibres. 0 0 0 0 000000. Tuesday 24th November 2020. 2. Nylon fibres. Synthetic fibers are made out of petrochemicals and last in the environment for a very long time. For any content/service related issues please contact on this number . Ans: Rayon is called a regenerated fibre because in the preparation of rayon, cellulose is broken down and then reformed. She has started this educational website with the mindset of spreading Free Education to everyone. 000004 00000004 00600004 00000004 00600004 0. . Rayon 4. Mon to Sat - 10 AM to 7 PM It is therefore advised not to wear synthetic clothes while working in a laboratory or working with fire in the kitchen. Synthetic fibers melt before burning and it is hazardous to the environment. Welcome to Sarthaks eConnect: A unique platform where students can interact with teachers/experts/students to get solutions to their queries. Ramya loves to were the clothes made up of synthetic fibres. The use of plastic material affects the environment because of the following reason: 1)Plastic is non-biodegradable.So the articles made of plastics do not rot when they are thrown away after use.The waste plastic articles keeps on accumulating in the surrounding and pollute the environment. The cellulose dissolves in the chemicals added. When she was working in kitchen, her mother advised her not to wear, 1. 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. You are very important to us. 00 0. The formed chain is called polymer. Question 1 How the use of plastic has a bad effect on the environment? Question 3 State whether plastic is biodegradable or non-biodegradable? Ans: Polyester. They can be easily handled and durable. 10) State one disadvantage of using synthetic fibres for making clothes ? Ans: Clothes made of synthetic fibres are not suitable for wearing during hot summer. 2)The waste plastic articles thrown here and there carelessly get into dirty water drains and sewers,and clog them.This makes the dirty drain water to flow over the streets and roads causing unhygienic conditions. 3. The e ectrical charge causes irritation of the skin. Clothes made of pure synthetic fibres are garishly lustrous. All types of questions are solved for all topics. (ii) Polymer is a Greek word in which ‘poly’ means many and ‘mer’ means units. 5. 0 000 00. Most synthetic fibres absorb very little moisture and do not allow air circulation making them hot and uncomfortable to wear. Hope the knowledge provided regarding the Synthetic Fibres and Plastics Class 8 Extra Questions and Answers has helped you to the possible extent. Â Rana wants to buy shirts for summer. See other topics from Chapter 3 Synthetic Fibres and Plastics, Biodegradable and Non-biodegradable material, Steps to save environment from plastic waste, Economics Chapter 2 Sectors of the Indian Economy – Notes & Study Material, Economics Chapter 1 Development – Notes & Study Material, Geography Chapter 6 Manufacturing Industries – Notes & Study Material. Download a PDF of free latest Sample questions with solutions for Class 8, Science, CBSE- Synthetic Fibres and Plastics . Synthetic fibers such as polyester is that they are not heat resistant and catch fire easily. Mer ’ means many and the word ‘ mer ’ means many and ‘ mer ’ means and... Varieties of colours are available as they melt easily following advantages.Most synthetic fibres and Plastics with the mindset spreading. 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2020 disadvantages of synthetic fibres class 8