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. Examples – nylon, acrylic, rayon, etc. They are generally cheaper than natural fibres. The e ectrical charge causes irritation of the skin. 3)The animals eat up the used polythene bags or plastic wrappers along with the left over food and vegetables wastes thrown on garbage dumps.The plastic wastes can choke the respiratory system of these animals or form a plastic lining in their stomach. Synthetic Fibres; Synthetic fibres are man-made. 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. Ans: Rayon is called a regenerated fibre because in the preparation of rayon, cellulose is broken down and then reformed. Question 14. Ans: polyester. Polyester fibres. Synthetic or Natural Fibres : The teacher can give the learner a piece of each and every type of fibre. Disadvantages of Synthetic Fibres Require careful ironing as they melt easily. (a) Cotton (b) Jute (c) Silk (d) Wool, The fibres such as rayon, nylon, polyester are obtained from (a) natural resources (b) chemical substances (c) minerals (d) plants and animals. List two disadvantages of synthetic fibres. Both types have pros and cons; natural fibers come from plants and animals, while synthetic fibers are made from chemical compounds, and each is valued in the textile industry for different reasons. Advantages-and disadvantages of synthetic fibres. Fibres that are made using raw materials from ______ are synthetic fibres. You are very important to us. Answer: Synthetic fibres dry up soon, are durable, less expensive, readily available and easy to maintain. This makes it stronger and easy to dye. Registration; Login; ... Class 8 Science Solved Q&A. They can be washed easily and they dry up fast. 8) Which synthetic fibre feels like wood and used as a substitute for wool ? 5. List two disadvantages of synthetic fibres. Question 15. Question 4 How do carelessly thrown plastic bags affect dirty water drains and sewers? Welcome to Sarthaks eConnect: A unique platform where students can interact with teachers/experts/students to get solutions to their queries. They can be easily handled and durable. Get NCERT Solutions, Notes and Practice Questions of Chapter 3 Class 8 - Synthetic Fibres and Plastics free at teachoo.Let's see what we will study in this chapterWhat arefibresDifferentTypes of Fibres- Natural, Synthetic and their examplesWhat isSynthetic FibreWhat is apolymerDifferenttypes of Synt 2. 4. Ans: Polyester. Required fields are marked *. Name the units of which cellulose polymer is made. This makes it stronger and easy to dye. Synthetic fibres and plastics Worksheet-5 Â What are the properties of polythene? Most fabrics made of synthetic fibres do not wrinkle easily. Download a PDF of free latest Sample questions with solutions for Class 8, Science, CBSE- Synthetic Fibres and Plastics . All fabrics are materials made from many fibres, which are obtained from natural or artificial sources. Colour Varieties of colours are available as they are manufactured. Synthetic fibres retain their original shape so it's easy to wash and wear. (ii) Polymer is a Greek word in which ‘poly’ means many and ‘mer’ means units. Synthetic fibres melt before burning. Fabrics made of synthetic fibres are generally more durable, less expensive, and more readily available than those made of natural fibres… They are insect ,stain , fungi and rot resistant. Polymer is a Greek word where ‘poly’ means many and the word ‘mer’ means units. Plastic, Its types and its advantages and disadvantages. 2. Nylon fibres. ... - Synthetic fiber re burning ° Some electrical char e accumulates on the synthetic fibers. 8788563422. This is actually a disadvantage with synthetic fibres. 4)When plastic bags are burnt they produce poisonous gases which pollute the air. For any content/service related issues please contact on this number . These types of fibers hydride by giving electrical charges which can cause skin problems. Types of Synthetic Fibres. Â Rana wants to buy shirts for summer. Synthetic fibers such as polyester is that they are not heat resistant and catch fire easily. Give the characteristics of synthetic fibres. The cellulose dissolves in the chemicals added. 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. 4. Synthetic fibre is soft and shiny. Advantages and disadvantages og synthetic fibres 1. Ans: Clothes made of synthetic fibres are not suitable for wearing during hot summer. She has started this educational website with the mindset of spreading Free Education to everyone. Clothes made of pure synthetic fibres are garishly lustrous. The fabrics made of synthetic fibres dries faster than cotton fabrics because they are less water absorbent. All synthetic fibres are man-made fibres that are prepared by a number of processes using raw material of petroleum origin, called petrochemicals. Ans: Two disadvantages of synthetic fibres are: (a) Synthetic fibres can't absorb moisture, which makes them unsuitable during summer. We should not wear synthetic clothes while working in the kitchen or laboratory. 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. Ans: Rayon is called a regenerated fibre because in the preparation of rayon, cellulose is broken down and then reformed. Â Explain why plastic containers are favoured for storing food. List the advantages and disadvantages of synthetic fibres. Synthetic fibre can be affected if washed using hot water. Synthetic Fibre of Class 8 They easily melt and burn to form small sticky beads at a very high temperature. DISADVANTAGES. 0660000. Answer. Question 1 How the use of plastic has a bad effect on the environment? View Answer It is that the synthetic fibres catch fire easily. 4. All types of questions are solved for all topics. More electrostatic energy is … The use of synthetic fibre is easy and less expensive. Most fabrics made of synthetic fibres do not wrinkle easily. Â Explain why the following are made of thermosetting plastics: (a) Saucepan handles, (b) Electric plugs/switches/plug boards. Mon to Sat - 10 AM to 7 PM 1.Do not wrinkle easily and they keep their colour and brightness for a much longer time than natural fibres such as cotton. Synthetic fibres are not easily acted upon by moisture, chemicals or bacteria. Disposal of plastic waste is a major problem because: 1)The articles made of plastic are non-biodegradable.They do not decompose easily. Has a really low melting point and can be easily damage by heat. Cotton is a natural fibre obtained from the cotton plant. Synthetic fibers such as polyester is that they are not heat resistant and catch fire easily. Using synthetic fibres such as nylon, is that they are stronger than many natural fibres such as silk or wool. (i) Synthetic fibres are made of small units of chemicals joined together in the form of large chain. advantages and disadvantages of synthetic fiber janeye hindi mein. Introduction of fibres. 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. When she was working in kitchen, her mother advised her not to wear, 1. advantages and disadvantages of synthetic fiber janeye hindi mein. Synthetic fibers melt before burning and it is hazardous to the environment. Ramya loves to were the clothes made up of synthetic fibres. Disadvantages of synthetic fibres: Question 3 State whether plastic is biodegradable or non-biodegradable? Acrylic fibres. Most synthetic fibres absorb very little moisture and do not allow air circulation making them hot and uncomfortable to wear. Kind of synthetic fibres. Properties of Synthetic FibresThey dry up easily (They soak less water)They are less expensive compared to natural fibresThey are durable (last long)They are readily available (not in shortage)They are stronger than natural fibres.They do not shrink and … 00 0. Last Updated on September 29, 2020 By Mrs Shilpi Nagpal 2 Comments. Synthetic Fibres and Plastics, CBSE Science Class 8 Chapter Wise Solved Q&A. 0 000 00. All other points are absolutely correct. 2)The burning of plastic gives out harmful gases which pollute the air. Rayon fibres. It is therefore advised not to wear synthetic clothes while working in a laboratory or working with fire in the kitchen. Advantages of Synthetic Fibres. Question 2 Explain,why disposal of plastic waste is a major problem.Give reason? Your email address will not be published. Question 5 How do carelessly thrown plastic bags affect animals? Class 8 Science Synthetic Fibres and Plastics Chapter 3 (8/9) Disadvantages of Plastics Explanation in Hindi, Imp Questions and Answers. Hence, these types of fibers cause pollution. The chain formed is called as polymer. These fibers are strong and elastic which gives it the properties to bounce. ... Q32: What are the disadvantages of synthetic fibres? Elastic Can easily be stretched out. 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. Tuesday 24th November 2020. When small units of chemicals join together in a large chain then synthetic fibres are formed. Synthetic fibers are not biodegradable. The synthetic fibres melt on heating. Rayon They catch fire easily as compared to natural fibre. You can add one more point to these disadvantages. Can be damaged by washing with hot liquids. Filed Under: Class 8, Synthetic fibres and Plastics Tagged With: disposal of plastic waste, harmful effect of plastics. Hope the knowledge provided regarding the Synthetic Fibres and Plastics Class 8 Extra Questions and Answers has helped you to the possible extent. Cellulose is made up of repeating units … You can also get complete NCERT solutions and Sample papers. The fabric melts and sticks to the body of the person wearing it. Examples: rayon, nylon, acrylic, etc. Synthetic fibers are made out of petrochemicals and last in the environment for a very long time. 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. Ans: Two disadvantages of synthetic fibres are: (a) Synthetic fibres can’t absorb moisture, which makes them unsuitable during summer. 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. 2. Polymers are huge molecules 2. Unlike natural fibers, they do not absorb sweat. 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. Disadvantages of synthetic fibres: Synthetic fibres suffer from the following disadvantages: 1. Which of the following fibres is considered as the strongest natural fibre? Synthetic fibres: These are man-made are called man-made or synthetic fibres. Shilpi Nagpal mam ☺, Your email address will not be published. Most synthetic fibres have good elasticity. During summers, synthetic fibres do not absorb sweat and a person wearing it feels uncomfortable. Disadvantages of Synthetic Fibres Most synthetic fibres do not absorb moisture. If the cloth catches fire it can be very disastrous. Thank you so much It break down into very small pieces called microplastics which cause pollution to soil and water bodies such as rivers, lakes and oceans. Recall, people usually suggest not to wear nylon clothes in kitchen. 9) To which kind of synthetic fibres does terylene belong ? 3. 10) State one disadvantage of using synthetic fibres for making clothes ? 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. 000004 00000004 00600004 00000004 00600004 0. . In the process it releases lots of poisonous fumes into the atmosphere causing air pollution. 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. All fabrics can be characterized as either natural or synthetic fibers (or a blend of the two). The fabrics made from this are worm resi slant. Soft Synthetic fibres are generally soft so they are used in clothing materials. 0 0 0 0 000000. Mam your website is very good for ncert solutions of class 8 and more….it really helps me to study during this lockdown The formed chain is called polymer.