Which one of the following is an example of thermosetting polymer . A) Polyethylene. Novolac, a condensation polymer of phenol and formaldehyde is a thermosetting polymer. Check Answer and Sol Is it thermoplastic or thermosetting plastic? C) Polymers. nylons. Q. 1:50 2.7k + polyethylene. (A) Bakelite (B) PVC (C) Nylon 6 , 6 (D) Buna- S . These polymers are also referred to as Thermosets or Thermosetting Plastics. Grocery bags. Which of the following polymers, need atleast one diene monomer for their preparation? We have provided Synthetic Fibres and Plastics Class 8 Science MCQs Questions with Answers to help students understand the concept very well. Explanation: Melamine resin or melamine formaldehyde (also shortened to melamine) is a hard, thermosetting plastic material made from melamine and formaldehyde by polymerization. 3) Thermoplastic 4) Thermosetting polymers 32. 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. It is used to make floor tiles, kitchenware and fire resistant fabrics. (ii) Linear slightly branched long chain molecules. Check Answer and Solution for abov This temperature is called which one of the following: (a) freezing point, (b) glass transition temperature, (c) melting temperature, or (d) recrystallization temperature? * a) PVC b) melamine c) polyethylene d) polystyrene 2 See answers dumeghanas dumeghanas Answer: melamine . Questions >> JEEMAIN and NEET >> Chemistry >> Polymers. Explanation: No explanation is available for this question! Share. (A) Polystyrene (B) Nylon (C) PVC (D) Polypropylene. Which of the following is an example of a synthetic polymer? Low-density polyethylene. 1. Tire rubber . These types of plastics can generally only be heated once to set them into the shape that is needed, and they are not generally recycled. 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. Which of the following is not an example of addition polymer ? MCQs Of Polymer chemistry 1. Which of the following is a thermosetting polymer? Answer/Explanation. (iii) Become infusible on moulding so cannot be reused. B) A Liner Polymer. Which of the following monomers form biodegradable polymers? The chain growth process is usually much slower than the condensation process. As engineering materials, they are relatively new compared to metals and ceramics, dating only from around the mid-1800 s. It is appropriate to divide them into the following three categories; Thermoplastic polymers (thermoplastics/TP) Thermosetting polymers (thermosets/TS) Elastomers (rubbers/E) Neoprene rubber are thermoplastic polymers. 60 seconds . Answer Explanation ANSWER: Thermosetting materials. Thermosetting Polymers - They are highly cross - linked, hard, infusible and insoluble polymers.They cannot be reused. Answer: Explaination: (b) and (c). Tags: Question 17 . When magnesium is the material of choice, it is almost always for weight reduction.t/f. Phenol formaldehyde resin/ Bakellite/ Novolac - - Obtained by the condensation reaction of phenol with formaldehyde. 60 seconds . A polymer plastic which cures irreversibly is called a thermosetting plastic. 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. Dacron and Novolac are condensation polymers. Tags: Question 18 . Studying NCERT Class 12 Chemistry exemplar for Chapter 15 Polymers will help you learn the concept comprehensively from the exam … Which of the following methods is used to cure thermosetting polymers? (a) Cellulose (b) Polythene (c) Polyvinyl chloride (d) Nylon-6. Some common examples are bakelite, urea-formaldelyde resins, etc. Which of the following is a thermosetting plastic? Justify each choice. सभी को देखें. Which compound form linear polymer … High-density polyethylene. It can cure because of heating, owing to a chemical reaction, or following irradiation like processing by means of electronic beams. The word thermosetting literally translates to something which sets permanently upon heating. Which of the following is a biodegradable polymer? Email. Ask Questions, Get Answers Menu X. home ask tuition questions practice papers mobile tutors pricing. Which of the following would you expect to be elastomers and which thermosetting polymers at room temperature? Sir/ Mam, It does not. D) Proteins _____ 3. Next similar question. 1 answer. - Novolac is linear Thermosetting polymers are a type of polymer where macromolecular chains bond with each other to form a cross-linked 3D (3 dimensional) network. SURVEY . C) Cellulose . Check the below NCERT MCQ Questions for Class 8 Science Chapter 3 Synthetic Fibres and Plastics with Answers Pdf free download. 31. 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. Report an issue . Melamine is a thermosetting plastic which is resistant to fire and can tolerate heat better than other plastics. - Step growth, Copolymer. true. These polymers are cross linked or heavily branched molecules, which on heating undergo extensive cross linking in moulds and again become infusible. C) A Branched Polymer. Magnesium can be significantly strengthened by cold work.t/f. 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. Define thermosetting polymer. MCQ Questions for Class 8 Science with Answers were prepared based on the latest exam pattern. asked Jun 20 in Chemistry by BhratJha (44.3k points) synthetic fibers and plastics; class-8; 0 votes. (i) Heavily branched cross linked polymers. A polymer which has a structure of interlinked chains. Among the following, the weakest interparticle forces of attraction are present in 1) Thermosetting polymers 2) Thermoplastic polymers 3) Fibres 4) Elastomers 33. epoxy. D) A Cross-Linked Polymer _____ 4. A. polyethylene B. a linear polymer C. a branched polymer D. a cross-linked polymer (i) Dacron (ii) Buna-S (iii) Neoprene (iv) Novolac; Which of the folloiwng are characteristics of thermosetting polymers? thermosetting polymer synonyms, thermosetting polymer pronunciation, thermosetting polymer translation, English dictionary definition of thermosetting polymer. answer choices . Plastic is a non-metallic material that can be moulded to any shape 2. Which one of the following is not a condensation polymer? Bakelite is an example of thermosetting polymer. Which of the following polymers, need atleast one diene monomer for their preparation? B) Plastics. X . AMU 2018: Which of the following is an example of thermosetting polymers? Among the following, the weakest inter-particle forces of attraction are present in 1) Thermosetting polymers 2) Thermoplastic polymers 3) Fibres 4) Elastomers 33. Thermoplastics are 1) Linear polymers 2) Soften or melt on heating 3) Molten polymer can be moulded in desired shape 4) All are correct Before the thermosetting plastic cures it is malleable and can be moulded into different forms, or used as an adhesive. Comment. Polymers can be separated into plastics and rubbers. - wherein. answer choices . Condensation polymers are obtained by bifunctional molecules (monomers) with the elimination of smaller molecules whereas additional polymers are obtained from multiple bonds containing monomers. Plastic is a natural or synthetic resin 3. A) Starch. Which of the following is a thermosetting polymer? Login. These cannot be reused. निम्नलिखित में से कौन सा एक थर्मोसेटिंग बहुलक है? [NCERT Exemplar] (a) Dacron (b) Buna-S (c) Neoprene (d) Novolac . They cannot be softened by heat but are decomposed by it. Thermosetting materials c. Both a. and b. d. None of the above. poor machinability . Properties of Thermosetting Polymers. polystyrene. while nylon-6,6 is a polyamide which is commonly known as fibre. What does it mean to be a thermosoftening polymer? Thermoplastics are 1) Linear polymers 2) Soften or melt on heating 3) Molten polymer can be moulded in desired shape The main physical difference is how they respond to high temperatures. Question from Polymers,jeemain,aipmt,chemistry,cbse,unit5,class12,organic-chemistry-polymers,q38,medium. false. 3) Thermoplastic 4) Thermosetting polymers 32. Bakelite is a thermosetting plastic which is a poor conductor of heat and electricity. 500+ + 400+ + 400+ + लिखित उत्तर . 1 answer. Answer. Report an issue . One of the main properties of thermoset plastics or polymers is that they harden during the moulding process and after solidifying they cannot be softened. It is used to make electrical switches and handles of utensils. 3-hydroxybutanoic acid+3-hydroxypentanoic acid II. SURVEY . Question 36. Eg:- Bakellite, Urea, Formaldehyde, Resin, etc . The material … Question 35. Teflon is a thermoplastic material and is much similar in structure to that of polyethylene but due to the strong C-F bond, its melting point goes high to 326°C. The terms thermoplastic and thermoset stand for how a material is or can be processed under a changed temperature [1]. Thermosetting polymers are cross linked and permanently rigid polymers which undergo permanent charge on heating. I. 2. Chat with tutors . Which of the following is an example of a thermosetting polymer? D) Proteins _____ 5. Which of the following is an example of a thermosetting polymer? 2) Which of the following statements are correct for plastic? Once set into a new solid cannot be remelted. False. A. Dacron B. Neoprene C. Melamine D. Glyptal 2. True. Which of the following is not a limitation of magnesium and magnesium alloys? Urea-formaldehyde resin Polyvinylchloride Polyester Neoprene Answer : A संबंधित वीडियो. Thermosetting polymer,bakelite is formed by the reaction of phenol with (a) CH 3 CH 2 CHO (b) CH 3 CHO (c) HCHO (d) HCOOH. Buna-S needs buta 1, 3-diene and Neoprene needs 2-chloro 1,3-butadiene. While polyethylene is a thermoplastic polymer … Which of the following is a thermosetting polymer? Neoprene is a polymer of chloroprene (CH 2 =C(Cl)-C=CH 2) so it is an addition polymer, not a condensation polymer. 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2020 which of the following is a thermosetting polymer