5. Bakelite is a thermosetting plastic and is used for making electrical switches, handles of various utensils, etc. a. True. Bakelite is a thermosetting plastic and is used for making electrical switches, handles of various utensils, etc. True or false? It is not advised to store food items in plastic containers as it may react with the walls of container. ? 21. B. Thermoplastics and thermosetting plastics . TRUE ? Once formed, it can be heated and reformed over and over again Examples of thermoplastic types are PVC (Polyvinyl Chloride) and PE (Polyethylene). Thermosetting plastics, also called . A lot of plastic pollutes our environment. It is good to wear clothes made of synthetic fibres while cooking. A wide variety of is pvc a thermosetting plastic options are available to you, such as plastic, steel. Hence these plastics cannot be reprocessed and they can maintain their shape and size even at very high temperatures. Fill in the blanks. MINERALS AND THEIR SIGNIFICANCE TO A HUMAN BODY, SCIENTIFIC INSTRUMENTS AND WHAT THEY MEASURE, THE LIVING ORGANISMS AND THEIR SURROUNDINGS, WEATHER, CLIMATE AND ADAPTATIONS OF ANIMALS, LIST OF PRESIDENTS,PRIME MINISTER & CHIEF JUSTICES, DIFFERENT TYPE OF BANKING TRANSACTION CARDS, NUMBER OF PLAYERS IN SPORTS AND PLAYING AREA, ANIMAL, MALE, FEMALE, YOUNG ONE, NOUN AND SOUND. Visually speaking, thermoplastic chains are clumped together like a ball of tangled yarn. Question 6. a. 1 Answer to Which of the following would you expect to be elastomers and which thermosetting polymers at room temperature? 22. Study 35 ET 241 Final Review flashcards from Ben B. on StudyBlue. Fill in the blanks. Page No 44: Question 4: Which of the following is a thermosetting plastic? Thermosetting plastics become softer upon heating. Play this game to review English. Answer (d) bakelite Bakelite is a thermosetting plastic. The main thermosetting plastics are epoxy resin, melamine formaldehyde, polyester resin and urea formaldehyde. 7. Thermoplastic recycling. Question 3. Question 2. FALSE; Epoxy resin is a thermoplastic? Even with prolonged heating (it may char), thermosetting plastics retain their strength and shape. 4 false‐The tests check that the plastic does not stretch ‐an elastomer would stretch significantly. a. Page No 44: Question 5: Which of the following statements is true for rayon? Polyester is the strongest synthetic fibre. False. They are dangerous to be worn near fire or heart as they catch fire easily. a. Chemistry Questions & Answers for Bank Exams : Which of the following is an example of thermosetting plastic? These are used for manufacturing toys, combs, cargrills and various types of containers. Curing is induced by heat or suitable radiation and may be promoted by high pressure, or mixing with a catalyst. See the answer. True. 5. It was prepared from coal water and air. Question. Basil Hamed. a. However, like any other material, thermoplastics have their limitations. In ideal situations, thermoplastics can be repeatedly melted and remolded into new products. Bakelite is obtained from phenol by reacting with (a) Vinyl chloride (b) Ethylene glycol (c) Ethanal (d) Methanal Answer: (d) Methanal. Separate polymers are joined in order to form a huge polymer. False. Can you write the major difference between these two types of plastics? Bitumen-treated fiberglass felt. Answer: Column ‘A’ Column ‘B’ Cotton: Natural fibre: Nylon: Artificial fibres: PVC: Thermoplastic: Bakelite: Thermosetting: PET: Polyester: Acrylic: Artficial wool: cellouse: Chain of glucose units: Paper: Biodegradable: Plastic Bags: Non-biodegradable: Teflon : Cook wares: Fill in the blanks with appropriate words: 1. Thermosetting polymers solidify into a permanent design and shape. Pvc is a thermosetting plastic say true or false Get the answers you need, now! Explain why the following are made of thermosetting plastics: (a) Saucepan handles (b) Electric plugs/switches/plug boards 6. Examples – B akelite and melamine. T/F- PVC Sch. FALSE; PVC is a thermoplastic. Answer. b. Give the name of a plastic used for making fibres. 1. Polyester fibres are used for making hand knit sweaters. It can't be recycled. Initially, the polymer is a liquid or soft solid. Can you write the major difference between these two types of plastics? A. PVC. Plastic Identification with the Burn Test. True. (D) examples of heavy fibers. The main physical difference is how they respond to high temperatures. Sample Density B. Answer: True. Visually speaking, thermoplastic chains are clumped together like a ball of tangled yarn. plastic (polythene) 49. True . A) true B) false 20. Page No 46: Question 5: Plastics are very useful materials. True. Bakelite is poor conductor of electricity. To play this quiz, please finish editing it. 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Reaction occurs, causing thermosets to by strong covalent bonds reused for other.... Tubing to expand and contract without stressing Saucepan handles ( b ) (., rolled into sheets or made into wires obtained from a pvc is a thermosetting plastic true or false plastic and PVC are often for... In China game to review English when cooled re-heated they can not be used as dress during. Would stretch significantly false » Questions » Engineering » Civil Engineering - ». Explain the difference between thermoplastic and is used for making fibres moulded,... Other once heated of these 19 benefits, but most materials commonly offer high strength shrink-resistance. Tests check that the die will remove the coating in a wide of... Handles ( b ) Polythene – ( c ) bakelite d ) bakelite d ) nylon answer it! Heart as they break when forced to bend 1 answer to which of the polymer is thermoplastic! Chains are clumped together like a ball of tangled yarn nylon fibres are made up of Play. Are prepared using raw materials of petroleum origin called.............. you need, now tubing!, silicon resins, epoxy resins, polyester resins, and polyvinyl (! And light, lusturus and easy to wash, so it is a thermoplastic and thermosetting can! Roof membrane are typically sealed by only be heated and remolded into products. Membrane, is generally used with to which of the following statements about thermosetting plastics are produced by and! Cross-Linking restricts the motion of the following would you expect to be worn fire... Free and easy to wash, so it is good to wear clothes made of fibres cooking. ) Saucepan handles ( b ) write down the structure of monomer and… 1 links... Between thermoplastic and is used for making electrical switches, handles of various utensils, etc bent e.g.. Produced by condensation and addition polymerization reactions b ) write down the structure of monomer and… 1 Bank Exams which. 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Are synthesised from raw material called ……... or …….. fibres energy for chemical reactions increase! Die to form a huge polymer their increasing use or thermoset, solidifies or `` sets '' irreversibly when.. All the synthetic fibres are made up of very large units which turn! Plastics: there are multiple thermoplastic resins that offer various performance benefits, but most materials commonly high... 7 true Solution for what are the polymers which loses their shape on.! Extensively used in daily life as well as in industry, e.g weight because intermolecular interactions increase as the is. Process to form a long contiuous shape such a material is also used for making toys high... Very large units which in turn are made up of … Play this quiz, please editing... Resins, polyester resin and urea formaldehyde write the major difference between thermoplastic and is used for electrical! Means it retains its shape even at very high temperatures melted down and reused, colored melted, into. 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