3. Synthetic Fibres And Plastics Class 8 Science [LATEST] Solutions Additional Questions With Solutions in English - CBSE Study
NCERT Solutions for Class 8 Science are carefully prepared according to the latest CBSE syllabus and NCERT textbooks to help students understand every concept clearly. These solutions cover all important 3. Synthetic Fibres And Plastics with detailed explanations and step-by-step answers for better exam preparation. Each Additional Questions With Solutions is explained in simple language so that students can easily grasp the fundamentals and improve their academic performance. The study material is designed to support daily homework, revision practice, and final exam preparation for Class 8 students. With accurate answers, concept clarity, and structured content, these NCERT solutions help learners build confidence and score higher marks in their examinations. Whether you are revising a specific topic or preparing an entire chapter, this resource provides reliable and syllabus-based guidance for complete success in Science.
Class 8 English Medium Science All Chapters:
3. Synthetic Fibres And Plastics
4. Additional Questions With Solutions
Additional Questions With Solutions
Que: Name the sources of fibres, by which are fabrics made?
Ans: Natural fibres and artificial fibres.
Que: Name the some natural fibres.
Ans: (i) Cotton (ii) wool (iii) silk
Que: Name some artificial or synthetic fibres.
Ans: (i) Rayon (ii) Nylon (iii) polyester and (iv) Acrylic
Que: What are synthetic fibres?
Ans: The fibres which are made by the human beings is called synthetic fibres. As Rayon, Nylon, polyester and Acrylic
Que: What is polymer?
Ans: The small units of fibres which is actually a chemical substance, such many small units combine to form a large single units is called a polymer. Ex. Cellulose, Nylon, polyester etc.
Que: Name a natural polymer.
Ans: Cellulose.
Que: Write the property of Rayon.
Ans: Rayon is the man-made fibre which is obtained by chemical treatment of wood pulp.
Properties:
(i) It is cheaper than silk.
(ii) It can be woven like silk fibre.
(iii) It can also be dyed in a wide variety of colours.
Que: Write the three property of Nylon.
Ans: Nylon is also man-made fibre. It was prepared from coal, water, and air. Properties;
(i) It is strong, elastic and light.
(ii) It is lustrous and easy to wash.
Que: Write the use of nylon?
Ans: Nylon is used for making parachutes and ropes for rock climbing. A nylon thread is an actually stronger than a steel wire. It is also used for making cloth.
Que: Name some synthetics fibers which are used for wearing.
Ans: Polyester and Terylene.
Que: What is PET and write its uses?
Ans: PET is a very familiar form of polyester. It is used for making bottles, utensils, films, wires and many other useful products.
Que: What is acrylic?
Ans: The wool which are actually not made from natural wool. These are prepared from another type of synthetic fibre called acrylic.
Que: What are thermoplastics?
Ans: Such plastic which gets deformed easily on heating and can be bent easily are known as thermoplastics.
Que: What are thermosetting plastics?
Ans: Some plastics which when moulded once, cannot be softened by heating. These are called thermosetting plastics.
Que: Give examples to show that plastics are noncorrosive in nature.
Ans: The plastic is noncorrosive in nature because of it doesn’t react to air and water.
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