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