which of the following is a thermosetting polymer

06/12/2020 Uncategorized

Report an issue . (ii) Linear slightly branched long chain molecules. Bakelite is a thermosetting plastic which is a poor conductor of heat and electricity. (a) Cellulose (b) Polythene (c) Polyvinyl chloride (d) Nylon-6. C) Cellulose . Which of the following monomers form biodegradable polymers? A) Polyethylene. [NCERT Exemplar] (a) Dacron (b) Buna-S (c) Neoprene (d) Novolac . Explanation: Melamine resin or melamine formaldehyde (also shortened to melamine) is a hard, thermosetting plastic material made from melamine and formaldehyde by polymerization. Buna-S needs buta 1, 3-diene and Neoprene needs 2-chloro 1,3-butadiene. D) Proteins _____ 3. False. Tags: Question 17 . The terms thermoplastic and thermoset stand for how a material is or can be processed under a changed temperature [1]. Which of the following is an example of a synthetic polymer? Chat with tutors . It is used to make floor tiles, kitchenware and fire resistant fabrics. D) Proteins _____ 5. Which one of the following is an example of thermosetting polymer . Which of the following is a thermosetting polymer? (i) Heavily branched cross linked polymers. 1. Comment. thermosetting polymer synonyms, thermosetting polymer pronunciation, thermosetting polymer translation, English dictionary definition of thermosetting polymer. Magnesium can be significantly strengthened by cold work.t/f. Among the following, the weakest inter-particle forces of attraction are present in 1) Thermosetting polymers 2) Thermoplastic polymers 3) Fibres 4) Elastomers 33. Question 36. Properties of Thermosetting Polymers. polyethylene. Plastic is a non-metallic material that can be moulded to any shape 2. Dacron and Novolac are condensation polymers. Which of the following is an example of a thermosetting polymer? Once set into a new solid cannot be remelted. Check Answer and Sol 1 answer. Answer Explanation ANSWER: Thermosetting materials. epoxy. We have provided Synthetic Fibres and Plastics Class 8 Science MCQs Questions with Answers to help students understand the concept very well. * a) PVC b) melamine c) polyethylene d) polystyrene 2 See answers dumeghanas dumeghanas Answer: melamine . Some common examples are bakelite, urea-formaldelyde resins, etc. Thermosetting polymers are cross linked and permanently rigid polymers which undergo permanent charge on heating. (A) Polystyrene (B) Nylon (C) PVC (D) Polypropylene. With a number of benefits to thermosetting plastics vs. thermoplastics, the methods and materials fill an important role in the plastic fabrication industry.Within the class of thermosetting polymers, there are a number of different types of material that each serve unique purposes and applications. Check Answer and Solution for abov 1 answer. 2) Which of the following statements are correct for plastic? Check the below NCERT MCQ Questions for Class 8 Science Chapter 3 Synthetic Fibres and Plastics with Answers Pdf free download. Neoprene rubber are thermoplastic polymers. Eg:- Bakellite, Urea, Formaldehyde, Resin, etc . A polymer plastic which cures irreversibly is called a thermosetting plastic. Polymers can be separated into plastics and rubbers. Tags: Question 18 . Urea-formaldehyde resin Polyvinylchloride Polyester Neoprene Answer : A संबंधित वीडियो. 3) Thermoplastic 4) Thermosetting polymers 32. Which compound form linear polymer … (iii) Become infusible on moulding so cannot be reused. Justify each choice. Which of the following is not a limitation of magnesium and magnesium alloys? 31. (A) Bakelite (B) PVC (C) Nylon 6 , 6 (D) Buna- S . NCERT Class 12 Chemistry Exemplar for Chapter 15 Polymers provide you polymer questions multiple choice, polymer MCQ for NEET, Fill in the blanks, Match the following, True or False, Worksheets, polymers Class 12 important questions, exercises and assignments. It can cure because of heating, owing to a chemical reaction, or following irradiation like processing by means of electronic beams. The chain growth process is usually much slower than the condensation process. Options (a) – CH₂ – C = CH – CH₂ – I Cl (b) – CH₂ – CH – I Cl (c) H H O O I I II II – N – (CH₂)₆ – N – C – (CH₂)₄ – C – (d) Correct Answer: Explanation: No explanation available. Which of the following would you expect to be elastomers and which thermosetting polymers at room temperature? Which one of the following is not a condensation polymer? It is used to make electrical switches and handles of utensils. Bakelite is an example of thermosetting polymer. Thermosetting polymers are a type of polymer where macromolecular chains bond with each other to form a cross-linked 3D (3 dimensional) network. Which of the following plastics do not have cross-links between their polymer chains asked Jun 20 in Chemistry by BhratJha (44.3k points) synthetic fibers and plastics; class-8; 0 votes. Which of the following is a thermosetting plastic? Melamine is a thermosetting plastic which is resistant to fire and can tolerate heat better than other plastics. C) A Branched Polymer. Email. polystyrene. Which of the following is an example of a thermosetting polymer? Low-density polyethylene. Condensation polymers are obtained by bifunctional molecules (monomers) with the elimination of smaller molecules whereas additional polymers are obtained from multiple bonds containing monomers. The material of choice, it is used to make electrical switches handles. For plastic to cure thermosetting polymers are cross linked and permanently rigid polymers undergo. 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