7 Which of the following is the chemically inert to organic solvents? HIPS ? 5) HDPE is a tough plastic used for making toys. A. a. PVC. Rubber tapped from para rubber trees is a polymer of isoprene monomers. Like cyanamide, it contains 67% nitrogen by mass, and its derivatives have fire retardant properties due to its release of nitrogen gas when burned or charred. Question 7. FALSE; PVC is a thermoplastic. 25 State whether the following statements are True/False. 7. (b) Thermosets cannot be reshaped. A full revision with question-answer and explanation in the form of MCQs based on latest CBSE Syllabus for new academic session 2020-2021. Nylon is a thermoplastic polymer. Strong heat causes these polymers to discolor and decompose. b. a. [CBSE AIPMT 2012] A. Play this game to review English. Melamine (MF) ? Different types of synthetic fibres like, Rayon fibres, Nylon fibres, Polyester fibres and Acrylic fibres have been explained. True or False? Die Schwerpunkte der Forschung liegen auf … 4) PVC is a thermoplastic. Nylon was also known as artificial silk in China. (a) natural polymer (b) semi-synthetic polymer (c) synthetic polymer (d) plasticiser. FALSE; Which of the following is commonly used in schools for vacuum forming? On the opposite of that Thermosetting doesn't regain its shape after heating. ... Rubber is a linear polymer. (True or False) c) Most polymers used in 3D printing applications are thermoplastic (True or False) a. FALSE; HDPE is a tough plastic used for making toys. b. True. 17.Which kinds of materials are used in civil structures? A. 6 Which of the following is the thermoplastic material? Plastic is suitable for building large and heavy structures. B. Neoprene. Rayon is (a) natural silk (b) artificial silk (c) natural rubber (d) synthetic plastic. (ii) Cross-linked polymers: These are formed from bi- functional and tri- functional monomers. False. 6) Which of the following is commonly used in schools for vacuum forming? 23. b. TRUE ? TRUE ? Play this game to review Chemical Bonds. Synthetic fibre do not melt on heating. The repeat unit in natural rubber is isoprene. true or false In an addition polymerization reaction the polymer is the sole product true or false Thermoplastic polymers may be converted into thermosetting polymers. Italmatch Chemicals manufacture and develop Phosphorus and Nitrogen based Flame Retardant Additive in many polymer applications, mainly for thermoplastic polymers but also for thermoset and carpet backing applications. Answer. State whether the statements given below are True or False’. Melamine plastic or melamine formaldehyde is a hard, thermoset plastic material made from melamine and formaldehyde by polymerization. It can cure because of heating, owing to a chemical reaction, or following irradiation like processing by means of electronic beams. ... State whether the following statements are True or False: Question 1. All polymers made from polyethylene will have the same density. Question 46. True. ? True. TRUE ? Small molecules that make up larger molecules. (a) Rayon (b) Polymer (c) Terylene (d) Plastic (e) Polyester (f) Teflon. ... Melamine is (a) thermoplastic polymer (b) thermosetting polymer (c) fibre (d) elastomer. True or False: Celluloid was used for billiard balls, men's fashion collars, and movie film. Answer/Explanation. B epoxy C. C melamine. Which one of the following is not a condensation polymer? Answer. Novolac, a condensation polymer of phenol and formaldehyde is a thermosetting polymer. Thermoplastic softens on heating and then can be moulded into various shapes. Before the thermosetting plastic cures it is malleable and can be moulded into different forms, or used as an adhesive. TRUE ? Polyethylene, or PE, is a polymer composed of chains of ethylene units.... See full answer below. All fibres are made up of very large units which in turn are made up of many small units. A true B. 1) Answer True or False for the following questions. As with most rubbers, neoprene is an elastomer. FALSE. B. FALSE; Epoxy resin is a thermoplastic? TRUE ? The key difference between thermoplastic and thermoset is that thermoplastic can be melted into any shape and re-used whereas thermosets have a permanent shape and cannot be recycled into new forms of plastic.. Thermoplastic and thermoset are terms we use to characterize polymers depending on their behaviour when subjected to heat, hence the prefix, ‘thermo’. 1. The assertion is true but the reason is false. 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. B false. Such as low density polythene. true or false A true B. 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