C) Addition polymers contain all of the atoms of the original monomers, but condensation polymers do not. They are very rigid, hard, and brittle. Presented here are the properties and other uses of Bakelite you should know about. Formation of a condensation polymer, on the other hand, produces H 2 O, HCl, or some other simple molecule which escapes as a gas. A. Bakelite B. Melamine C. Branched D. Poly-vinyl chloride 9. But there is no loss of an atom or a molecule. Linear polymers: Polythene, Polyvinylchloride. Familiar examples of cross-linked polymers are Bakelite, rubber, and casting (boat) resin. (a) Distinguish between homopolymers and copolymers. 1 answer. uses no catalyst. 1) Polythene 2) PVC (a) PMMA (b) Nylon- 6, 6 (c) Dacron (d) Bakelite. 20: Which of the following is an addition polymer? PVC (polyvinyl chloride), which is found in plastic wrap, simulated leather, water pipes, and garden hoses, is formed from vinyl chloride (H 2 C=CHCl). 16: Three dimensional molecules with cross links are formed in the case of a _____ 17: Which is not polymer? (A) Polystyrene (B) Nylon (C) PVC (D) Polypropylene. A) Glucose done clear. An example is vulcanized rubber. The best example is polymerization of ethylene. Along came Bakelite – which is the first example of a truly synthetic polymer (the rest were just modifications of cellulose). They have a stronger covalent bond in comparison to other linear polymers. All India 2013) Answer: EXAMPLES-Bakelite,formaldehyde etc. The synthesis of bakelite starts with the reaction between formaldehyde (H 2 CO) and phenol (C 6 H 5 OH) to form a mixture of ortho- and para-substituted phenols. Teflon is formed by step growth polymerisation. Addition polymers are generally formed by chain growth polymerisation. Other Addition Polymers. Bakelite done clear. Why bakelite is said to be an example for thermosetting polymer? Bakelite is an example of polymer. Based on the mode of polymerisation, it is classified into; Addition polymers: Polymers are formed by the repeated addition of monomers with double and triple bonds. Answer: Bakelite is the condensation polymer of phenol and formaldehyde. Differentiate between the modes of formation of an addition polymer and a condensation polymer. (b) What are biodegradable polymers? Bakelite, formed from the condensation reaction of phenol with formaldehyde, became hugely popular – perhaps you have seen products with Bakelite, such as … Polymers can also be classified on the basis of mode of polymerisation into two sub groups. Which of the following is not an example of addition polymer ? It is a phenol formaldehyde resin, formed from condensation reaction of phenol and formaldehyde Solution: Bakelite is a thermosetting polymer. Examples: Terylene, Bakelite, ... Related questions 0 votes. What is Bakelite Plastic? The process can be … Odd one out: choose the letter of the word that is not related from the other choices. Ans. together to form a 3 dimensional network polymers. Ever wondered why the plastic Bakelite was used to make those bangles and chess pieces? It is further classified into, The double bonds in monomers break and they join to form a big molecule. Modelling addition polymers. Question 10. It is used for … Give one example. Other Ways to Classify Polymers Classification Based on Polymerization. Historical aspects. USES: It is used as a material resistant to heat and chemical attack in household works. It is an addition polymer of tetraflouroethylene.It is bad conductor of heat. Bakelite is the first synthetic plastic and is known as a “material of thousand uses” due to its versatile applications. The monomers used are unsaturated compounds like alkenes, alkadienes and their derivatives. Plus Two Chemistry Polymers Three Mark Questions and Answers. Poly(ethene) is an addition polymer. 9. In addition polymerisation, the molecules of the same monomer add together on a large scale to form a polymer. These polymers have many cross-linking bonds that give rise to a network-like structure. An Overview of its Properties and Uses. Bakelite, trademarked synthetic resin invented in 1907 by Belgian-born American chemist Leo Hendrik Baekeland. Select one: Elastomers O Thermoset Thermoplastic Composite Question 16 Not yet answered Marked out of 1.00 P Flag question The following figure represents Face Centered Cubic structure Select one: True O False CET 2001] A) Silk done clear. B) Both addition polymers and condensation polymers lose some atoms from the original monomers when the polymer is formed. Free Radical Polymerization: Here the addition polymer forms by addition of atoms with a … A) Both addition polymers and condensation polymers contain all of the atoms of the monomers. Addition and condensation polymers can exist with a cross-linked network, depending on the monomers used in the synthesis. PROPERTIES:-Tensile strength; Higher tensile strength holds a greater weight before snapping. C) Urea-formaldehyde resin done clear. Again there are four types of addition polymerizations which are. What is bakelite? A familiar example of a condensation polymer is nylon, which is obtained from the reaction of two monomers. 18: Which is used in formation of nylon-66? Fibers. It is because of the unique properties it possesses. What is its use? A hard, infusible, and chemically resistant plastic, Bakelite was based on a chemical combination of phenol and formaldehyde (phenol-formaldehyde resin), two compounds that were derived Give one example of each of these ... Monomers combine together with the loss of molecules like H 2 O, NH 3, etc. A. Bakelite B. Melamine C. Branched D. Cross-linked 10. They are composed of bifunctional and trifunctional monomers. When addition polymers form, ... Styrene-butadiene rubber is an example of a a. copolymer b. natural elastomer c. natural cross linked polymer The reaction is shown in the graphic on the left. Contributors; When addition polymers are formed, no by-products result. These questions are likely to appear in entrance exam of MBBS, ENGINEERING , BDS, BN, BMLT, AG , BVSC and various other medical and paramedical entrance exams. 19: Which of the following has ester linkage? They have a very strong intermolecular force. Addition polymers are a type of polymer in which all the monomers are unsaturated or to simply to say are alkenes. Network polymers: Bakelite, Melamine. Key Difference – Bakelite vs Plastic Plastic and Bakelite are both organic polymers, having a very large molecular weight though there exists a difference between the two based on their properties and usage. Orientation of monomer units in a polymer molecule A. Tacticity B. Graft C. Linear D. Monomer arrangement 11. Some common examples are Proteins (which are found in humans and animals alike), ... thermosetting polymer is that of Bakelite, which is used in making electrical insulation. Most natural polymers being employed at early stage of human society are of condensation type. Type Addition polymer Bakelite Monomer Phenol and Formaldehyde Type Condensation polymer Natural Rubber Monomer Isoprene Type Addition polymer. Which is an example of thermosetting polymer? Example: Formation of polythene from ethene. These polymers contain bi-functional and tri-functional monomers and strong covalent bonds between various linear polymer chains. Question 47. Addition polymers: Polyvinyl chloride, polythene.Condensation polymers: Terylene, Bakelite. Which of the following is an addition polymer . Condensation polymers are generally formed by step growth polymerisation. Some examples include, bakelite and melamine formaldehyde resin. Here are 100 most important Multiple choice questions and answers on Polymer and Polymerization for the entrance exams. Addition Polymerization: Example, poly ethane, Teflon, Polyvinyl chloride (PVC) Which of the following polymer is an example of fibre [AIIMS 2000; Pb. The first truly synthetic plastic was bakelite, developed by Leo Baekland between 1905 and 1914. Polymer obtained by condensation polymerization is 1) Polythene 2) Teflon 3) Phenol-formaldehyde 4) Nitrile rubber 2. The synthesis of first truly synthetic polymeric material, bakelite, was announced by Leo Baekeland in 1907, through a typical step-growth polymerization fashion of phenol and formaldehyde.The pioneer of synthetic polymer science, Wallace Carothers, developed a new means … During addition polymerization, the monomers rearrange themselves to form a new structure. Examples of such polymers include bakelite and melmac. Which compound form linear polymer due to H-bond? The catalyst used in the manufacture of polythene by Ziegler method is Which of the following represents the example of homopolymer? Bakelite and melamine are examples in this category. Addition Polymers The addition polymers formed by the polymerisation of a single monomeric species are known as homopolymers. The polymer is a long chain molecule which is formed by joining many small molecules called monomers. Question 11. Examples – Bakelite, melamine, etc. It allows ethene molecules to join together to form a single product, so it is an example of an addition reaction. produces low density polythene. structure with tremendous rigidity. Question 1. A common example of linear polymer. In addition to the original Bakelite material, these companies eventually made a wide range of other products, many of which were marketed under the brand name "Bakelite plastics". Check Answer and Solution for abov The first semisynthetic polymer was actually made from a natural polymer. Bakelite is formed by step growth polymerisation. Give one example of each. SOME IMPORTANT POLYMERS NATURAL AND SYNTHETIC LIKE POLYMERS LIKE POLYSTERS, BAKELITE, RUBBER, BIODEGRABLE AND NON-BIODEGRABLE POLYMERS 1. Give two examples of each (i) linear polymer (ii) Network polymer. 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