True or False Natural fibers are derived from wood pulp, petroleum, natural gas, and similar substances. Which of the following fibre is natural polymer: (a) rayon (b) cotton (c) polyester (d) polythene. False. Answer. Answer: a) True b) False c) False d) True e) True f) False g) False. Answer: Natural Fibres : wool, cotton, silk, jute. Question 2. Also, write false statements in their correct form. fill in the blanks: Answer. True. f) Silk fibre is obtained from the stem of the plant. (False) 3.Question. True or False State whether the given statements are true or false. Natural fibers, such as wool or cotton, will give a better protection when welding than synthetic fibers like polyester. Answer. g) Polyester is a natural fibre. Answer. 1. Explanation: a)& b) Process of making yarn from fibres is called spinning. True or False PLA fibers are similar to cotton in appearance. (iii) It is risky to wear synthetic clothes while working in the kitchen. Question 1 Classify the following fibres as natural or synthetic: nylon, wool, cotton, silk, polyester, jute. b) Spinning is a process of making fibres. (c) False; Jute fibre is obtained from the stem of jute plant. 4. Classify the following fibres as natural or synthetic: nylon, wool, cotton, silk, polyester, jute. 6. From which parts of the cotton and jute are obtained? (b) Animals fibers are silk and wool. 3. Polyester is the strongest synthetic fibre. (b) Spinning is a process of making fibres. 2. 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. (ii) Synthetic fibres do not melt on heating. (True) (f) Silk fiber is obtained from the stem of a plant. Rayon synthesised for the first time in England. Rayon is made from cellulose obtained from wood pulp. (False) (g) Polyester is a natural fiber. Answer ... State whether the following statements are True or False: Question 1. True) (e) Weaving yarn makes a piece of fabric. c) We get jute fibres from the outer layer of a stem of the jute plant. 5. (a) Plant fibers are obtained from cotton and jute. State whether the following statements are true or false: (a) Yarn is made from fibres. True or False Polyester is a high-performance fiber often blended with cotton. Rayon is a natural fibre. (g) Polyester is a natural fibre. Question 2 State whether the following statements are true or false: a) Yarn is made from fibres. Question 2. Synthetic Fibres : nylon, polyester. (i) The fabric terry wool is obtained by mixing terylene and wool. Artificial silk is another name for silk. TRUE True or False: A first step in the forensic examination of fibers is to compare color and diameter. Q. (iv) Most of the plastics are biodegradable. True or False: Polyester was the first synthetic fiber. 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