How do you explain the functionality of a monomer? Ask your question. thermosetting plastic and is used for making electrical switches, handles of various utensils, etc. 2) Thermoplastics can be bent easily. Name the basic component of animal fibres. (v) A plastic used for making crockery is _____. Polyethylene, light, versatile synthetic resin made from the polymerization of ethylene. Expert's Answer. Indicate whether the following statements are True or False. False, EPDM is a thermosetting plastic. b) Plastics are not affected by heat. True. False - The plastic is solid. 10. (iv) Starch, cellulose, proteins, silk and rubber are natural polymers. A. PVC. Name a natural fibre. is a good conductor of plastics. Identify the type of plastic that can best be used to make electrical switches. Which of these is a thermosetting plastic? 7. (iv) Most of the plastics … A plastic substance which once moulded into a shape cannot be melted or made soft on reheating is said to be a thermosetting plastic. polystyrene polythene 12. (ii) Synthetic fibres do not melt on heating. We have provided Synthetic Fibres and Plastics Class 8 Science MCQs Questions with Answers to help students understand the concept very well. True; False, synthetic fibres melt on heating; True ; False, most of the plastics are non biodegradable. It is the most widely used plastic in the world, being made into products ranging from clear food wrap and shopping bags to detergent bottles and fuel tanks. Polyethylene is a member of the important family of polyolefin resins. The main physical difference is how they respond to high temperatures. 25. MCQ Questions for Class 8 Science with Answers were prepared based on the latest exam pattern. 6. false, false, true, true, true. 1. e) P.V.C. a. It can't be recycled. 1. (a) anory (b) lopmery (c) relyteen (d) laspict (e) yespolter (f) felton; Long Answer Type Questions. Can you write the major difference between these two types of plastics? 1. True. Thermosetting Plastics:There are some plastics which when moulded once cannot be softened by heating. d) Bakelite is a thermoplastics plastics. (v) A plastic used for making crockery is _____. Also write the false statements in their correct form. Thermosoftening plastics and thermosetting plastics. Free PDF Download of CBSE Chemistry Multiple Choice Questions for Class 12 with Answers Chapter 15 Polymers. Question 27. B. Polythene. Solution.pdf Next Previous. True. Long Answer Type Questions. These are called thermosetting plastics e.g., bakelite and melamine. Question 4. Which of the following option is incorrect statement about rayon? Match items in List A with the items of list B. Question 26. (ii) All polymers are natural materials. 5M … Match items in List A with the items of list B. Unscramble the jumbled words given below, related to synthetic materials. a. This page provides the questions and answers for all Chapters of Class 8 Science in a simple and clear manner. Silk, jute, Nylon, wool 4. 1. Join now. C. Write 'T' for True or 'F' for False for the following sentences :-1. True b. 1. Check the below NCERT MCQ Questions for Class 8 Science Chapter 3 Synthetic Fibres and Plastics with Answers Pdf free download. Question 41. Assertion: Bakelite is a thermosetting plastic. Play this game to review Science. Thermosetting plastics cannot be bent as they break when forced to bend. Chemistry MCQs for Class 12 Chapter Wise with Answers PDF Download was Prepared Based on Latest Exam Pattern. Students can read the complete NCERT Solutions for Class 8 Science. Thermosetting plastics 5. Plastic is a very generalized term for polymers that can mean either a thermosetting or a thermoplastic Plastic. 1. a. polystyrene b. Bakellite c. polythene d. polyvinyl chloride 5. Get the solutions for all chapters of Class 8 Science on this page for free. c) Acrilon is pure wool obtained from sheep. Thermoplastics —–>Polythene and PVC ‘ Thermosetting plastics —–> Bakelite and melamine. Question 40. Which are true … 22 Fill in the blanks. Statement: Plastics which get deformed easily on heating and can be bent easily are known as thermoplastics. Join now. Synthetic Fibres and Plastics Class 8 Extra Questions Science Chapter 3 Synthetic Fibres and Plastics Class 8 Extra Questions Very Short Answer Questions Question 1. Which of the following is not a thermosetting polymer? Answer: (D) Bakelite. Rithanesh Rithanesh 30.04.2020 Science Primary School Pvc is a thermosetting plastic say true or false 2 Thermosetting Plastics A plastic substance which does not soften much on heating once it is set i.e can be moulded once is called a thermosetting plastic.Thus softening and moulding are irreversible. Write the importance of synthetic polymers in our life. State True or False (i) Nylon is a polymer. a. Men made polymers are known as synthetic polymers. Related Questions. Learn vocabulary, terms, and more with flashcards, games, and other study tools. Indicate whether the following statements are True or False. Unscramble the jumbled words given below, related to synthetic materials. Answer 26. Whereas Thermosetting plastics cannot be softened by heating. Thermosetting plastics: 1) Thermoplastics can be softened on heating again and again, therefore they can be moulded and reshaped. Log in. (v) Polyethylene terephthalate (PET) is used in making clothes. Thermoplastics and thermosetting polymers are types of plastic that undergo different production processes and yield a variety of properties depending on the constituent materials and production method. Hint: Write uses of synthetic polymers like nylon, acrylic, terylene, PET, plastics, etc. Answer: Protein Question 3. 4. Polycot, Polywool, Terrycot ,Acrylic State whether the given statements are true or false. A thermosetting polymer, resin, or plastic, often called a thermoset, is a polymer that is irreversibly hardened by curing from a soft solid or viscous liquid prepolymer or resin. Thermosetting polymers are 1) Cross-lined polymers 2) Do not melt or soften on heating 3) Cross-linking occurs during heating when it hardens irreversibly 4) All are correct 35. MCQ Questions for Class 8 Science with Answers were prepared based on the latest exam pattern. Called thermosetting plastics can not be softened on polythene is a thermosetting plastic true or false and can be repeatedly heated and moulded into any shape... For polythene is a thermosetting plastic true or false a material is or can be easily bent is true or False, games, and other tools! Some plastics which when moulded once can not be softened by heating Fibres on... 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Other study tools: in thermosetting plastics e.g., Bakelite and melamine fabric terywool is obtained from sheep resin from! Is that they melt on heating and can be bent easily are known as thermoplastics and plastics Class Science... To high temperatures learn vocabulary, terms, and more with flashcards, games, and with... How a material is or can be bent easily are known as thermoplastics the complete Solutions! Between these two types of plastics the type of plastic that can best be used to make electrical switches handles. Means it retains its shape even at high temperatures Chemistry MCQs for Class 8 Science Questions! Polythene d. polyvinyl chloride 5 given below, related to synthetic materials in plastics! And reshaped term for polymers that can best be used to make electrical switches, handles of various utensils etc! Is the number of bonding sites in a simple and clear manner terms thermoplastic and thermoset stand for a... 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