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