(a) True (b) False; The process of making yarn from fibres is called spinning. False. Answer. Check the below NCERT MCQ Questions for Class 8 Science Chapter 3 Synthetic Fibres and Plastics with Answers Pdf free download. Answer : (i) Natural fibres: Wool, silk, cotton, jute. 4.Question. We have provided Synthetic Fibres and Plastics Class 8 Science MCQs Questions with Answers to help students understand the concept very well. (ii) Synthetic fibres do not melt on heating. 4. True or False Polyester is a high-performance fiber often blended with cotton. fill in the blanks: Answer. D-opacity. True or False PLA fibers are similar to cotton in appearance. (False) (g) Polyester is a natural fiber. 6. Artificial silk is another name for silk. Rayon is the first man-made cellulose fibre. Answer ... State whether the following statements are True or False: Question 1. From which parts of the cotton and jute are obtained? Question 2 State whether the following statements are true or false: a) Yarn is made from fibres. State whether the following statements are true or false: (a) Yarn is made from fibres. (ii) Synthetic fibres: Nylon, polyester. Answer. 5. Nylon was made in 1931. f) Silk fibre is obtained from the stem of the plant. True or False Natural fibers are derived from wood pulp, petroleum, natural gas, and similar substances. Answer: Natural Fibres : wool, cotton, silk, jute. (False) 3.Question. g) Polyester is a natural fibre. IV. Question 2. True or False State whether the given statements are true or false. (a) Plant fibers are obtained from cotton and jute. Which of the following fibre is natural polymer: (a) rayon (b) cotton (c) polyester (d) polythene. Classify the following fibres as natural or synthetic: nylon, wool, cotton, silk, polyester, jute. 2. TRUE True or False: A first step in the forensic examination of fibers is to compare color and diameter. (iii) It is risky to wear synthetic clothes while working in the kitchen. Q. 3. 1. True or False: Polyester was the first synthetic fiber. (True) (f) Silk fiber is obtained from the stem of a plant. 7. b) Spinning is a process of making fibres. True. (iv) Most of the plastics are biodegradable. Explanation: a)& b) Process of making yarn from fibres is called spinning. True. (b) Spinning is a process of making fibres. c) We get jute fibres from the outer layer of a stem of the jute plant. Synthetic Fibres : nylon, polyester. (g) Polyester is a natural fibre. Question 1 Classify the following fibres as natural or synthetic: nylon, wool, cotton, silk, polyester, jute. Natural fibers, such as wool or cotton, will give a better protection when welding than synthetic fibers like polyester. Answer: a) True b) False c) False d) True e) True f) False g) False. Also, write false statements in their correct form. Rayon is made from cellulose obtained from wood pulp. Rayon is a natural fibre. 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