Question 2. Rayon is the first man-made cellulose fibre. Nylon was made in 1931. 4. True. (b) Animals fibers are silk and wool. Which of the following fibre is natural polymer: (a) rayon (b) cotton (c) polyester (d) polythene. Q. MCQ Questions for Class 8 Science with Answers were prepared based on the latest exam pattern. f) Silk fibre is obtained from the stem of the plant. Question 2 State whether the following statements are true or false: a) Yarn is made from fibres. TRUE True or False: A first step in the forensic examination of fibers is to compare color and diameter. Answer : (i) Natural fibres: Wool, silk, cotton, jute. (c) False; Jute fibre is obtained from the stem of jute plant. Rayon synthesised for the first time in England. (True) (f) Silk fiber is obtained from the stem of a plant. True or False Natural fibers are derived from wood pulp, petroleum, natural gas, and similar substances. Answer: Natural Fibres : wool, cotton, silk, jute. (iv) Most of the plastics are biodegradable. Polyester is the strongest synthetic fibre. Answer: a) True b) False c) False d) True e) True f) False g) False. True or False: Polyester was the first synthetic fiber. Answer ... State whether the following statements are True or False: Question 1. (iii) It is risky to wear synthetic clothes while working in the kitchen. b) Spinning is a process of making fibres. Rayon is made from cellulose obtained from wood pulp. True) (e) Weaving yarn makes a piece of fabric. Also, write false statements in their correct form. D-opacity. (False) 3.Question. (ii) Synthetic fibres do not melt on heating. IV. True or False State whether the given statements are true or false. g) Polyester is a natural fibre. Synthetic Fibres : nylon, polyester. 6. (False) (g) Polyester is a natural fiber. 2. Explanation: a)& b) Process of making yarn from fibres is called spinning. Polyester fibres are used for making hand knit sweaters. Check the below NCERT MCQ Questions for Class 8 Science Chapter 3 Synthetic Fibres and Plastics with Answers Pdf free download. (a) True (b) False; The process of making yarn from fibres is called spinning. True. 3. 4.Question. Answer. Answer. (ii) Synthetic fibres: Nylon, polyester. From which parts of the cotton and jute are obtained? 5. Answer. Question 2. Rayon is a natural fibre. Artificial silk is another name for silk. 1. Natural fibers, such as wool or cotton, will give a better protection when welding than synthetic fibers like polyester. We have provided Synthetic Fibres and Plastics Class 8 Science MCQs Questions with Answers to help students understand the concept very well. (b) Spinning is a process of making fibres. (i) The fabric terry wool is obtained by mixing terylene and wool. Classify the following fibres as natural or synthetic: nylon, wool, cotton, silk, polyester, jute. True. 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