21. Polymers are very large molecules made when many smaller molecules join together, end to end. 7. Free PDF Download of CBSE Chemistry Multiple Choice Questions for Class 12 with Answers Chapter 15 Polymers. The following Chapter 2–4 will describe in more detail the key prerequisite for biodegradability followed by a description of the synthesis properties and processing of the various biodegradable polymers. There are three main classes of biopolymers, classified according to the monomers used and the structure of the biopolymer formed: polynucleotides, polypeptides, and polysaccharides. Biopolymers are natural polymers produced by the cells of living organisms.Biopolymers consist of monomeric units that are covalently bonded to form larger molecules. Nov 12,2020 - Which of the following monomers form biodegradable polymers?a)3 – hydroxybutanoic acid + 3 – hydroxypentanoic acidb)Ethylene glycol + phthalic acidc)Glycine + amino caproic acidd)Both Glycine + amino caproic acid and Ethylene glycol + phthalic acidCorrect answer is option 'A,B'. These plastics cannot be softened again on heating. During addition As a result, biodegradable polymers offer a novel approach for developing sustained release drug delivery systems that are simple and convenient to patient. This test is Rated positive by 92% students preparing for Class 12.This MCQ test is related to Class 12 syllabus, prepared by Class 12 teachers. Nature has provided us a variety of polymers which can be produced by the biological systems in plants and animals. Differentiate between rubbers … € 1 (a) €€€€Draw the structure of the monomer used to form polymer P. ... €€€€ Draw the structure of each of the following isomers of C5H8O2 Label each structure you draw with the correct letter L, M, N, P or Q. NCERT DC Pandey Sunil Batra HC Verma Pradeep Errorless. POLYMERS Short Answer Questions: **1.What is PHBV? Which of the following monomers form biodegradable polymers? Ethylene glycol and terephthalic acid. Physics. The primary bonds found in a polymer are covalent bonds. Which one of the following monomers form biodegradable polymer? Biodegradable polymers are designed to degrade upon disposal by the action of living organisms. What process makes monomers into polymers? B) modifying a naturally occurring polymer to form celluloid. Is easily processable into the final product form. How is it useful to man? Phenol and formaldehyde undergo condensation to give a polymar (A) which on heating with formaldehyde gives a thermosetting polymer (B). Thus, monomers are the building blocks of polymers. Thermosetting polymers are cross-linked or heavily branched polymers which get hardened during the molding process. Polymers are usually non-biodegradable. In addition, there may be van der Waals bonds. In addition polymer, monomer used is (A) unsaturated compounds (B) saturated compounds (C) bifunctional saturated compounds Synthetic polymers are mostly non-biodegradable i.e., it is very difficult to dispose off the polymeric waste, e.g., polythene bags. Write the names and structures of the monomers of the following polymers: (i) Buna-S (ii) Buna-N (iii) Dacron (iv) Neoprene Is easily sterilized. (a) 3-hydroxybutanoic acid +3-hydroxypentanoic acid (b) Glycine + aminocaproic acid (c) Ethylene glycol + phthalic acid (d) Caprolactam Solution: (a, b) The polymers which are easily decomposed and not harmful for the environment are known as biodegradable polymer. NCERT P Bahadur IIT-JEE Previous Year Narendra Awasthi MS Chauhan. Answer: (d) 7. 6. Alkenes can be used to make polymers. Polymers have a high molecular mass (10 3 − 10 7 u).In a polymer, various monomer units are joined by strong covalent bonds. Chemistry. Repeating units of two polymers, P and Q, are shown in the figure below. Which of the following monomers form biodegradable polymers? It is used in speciality packing, orthopaedic devices and in controlled release of drugs. Phenol and caproic acid. The first attempts to make synthetic polymers involved A) combining monomers of ethylene to form polyethylene. ... Monosaccharides are monomers that can be joined together to form more complex carbohydrates. Polymers formed by a straightforward linking together of monomer units, with no loss or gain of material, are called addition polymers or chain-growth polymers.A listing of some important addition polymers and their monomer precursors is presented in the following table. Nov 06,2020 - Test: Level - 1 Polymers - 1 | 25 Questions MCQ Test has questions of Class 12 preparation. Which of the following is an environmental issue associated with burning polymers to dispose of them? Biology. By incorporating drug into the biodegradable polymers, the dosage forms releases the drug for a long period of time and can be … Urea and formaldehyde. Answer: Polymers are high molecular mass macromolecules, which consist of repeating structural units derived from monomers. Complete biodegradation is said to occur when there are no oligomers or monomers left. The monomers combine to form a … Synthetic biodegradable polymers () and biotechnologically based polymers (PHA) () are produced and used in the applications mentioned above.. Biodegradable polymers Abstract To prepare a biodegradable plastic, biodegradable materials such as starches and a non-biodegradable polymer such as a polystyrene, polyurethane, polyethylene, polypropylene, or polycarbonate are treated: (1) under heat, pressure and reagents to break the polymers; and (2) by adding to them an oxidizing agent. Amino acids Monosaccharides Nucleotides. निम्नलिखित में से कौन सा मोनोमर बायोडिग्रेडेबल पॉलिमर बनाता है? The factors affecting the mechanical performance of biodegradable polymers are those that are well known to the polymer scientist, and include monomer selection, initiator selection, process conditions, and the presence of additives. Proteins Carbohydrates Nucleic acids. In general, biodegradable polymers break down to form gases, salts, and biomass. Differentiate between biopolymers and biodegradable polymers and give examples of each type. Question 15. Books. Polymers. These giant molecules are also called macromolecules. D) the synthesis of polyamides. Advantages of Biodegradable Polymers as Drug Carriers. The individual smaller molecules are called monomers. (i) 3-hydroxybutanoic acid + 3-hydroxypentanoic acid (ii) Glycine + amino caproic acid (iii) Ethylene glycol + … The molecular mass of polymers. Many polymeric materials having chain-like structures similar to polyethylene are known. Introduction. 53. Answer. A polymer is a large molecule composed of many smaller units called monomers that are bonded together. Biopolymers and Biodegradable Polymers. Differentiate between rubbers and plastics on the basis of intermolecular forces. C. 3-hydroxybutanoic and 3-hydroxypentanoic acid. Overview of the chapter. 54. Monomer: A monomer can be defined as a molecule, which acts as a basic unit for the synthesis of polymers. Classification of polymers **2. Question 15.12: Write the monomers used for getting the following polymers. Commonly found polymers include carbohydrates, lipids or proteins, and are all made of repeating monomer units. How can biodegradable synthetic polymers be made. The repeating monomers form a linear or branch structure depending on the type of monomer. [20] The breakdown of these polymers depend on a variety of factors including the polymer and also, the environment the polymer is in. Match the following polymers with their monomers. Chemistry MCQs for Class 12 Chapter Wise with Answers PDF Download was Prepared Based on Latest Exam Pattern. C) compression molding. 3-hydroxybutanoic and 3-hydroxypentanoic acid. Biodegradable polymers. )Write the names and structures of monomers of the following polymers? Biodegradable Polymers Polymers of Commercial Importance Condensation Polymerisation or Step Growth Polymerisation Addition Polymerization As the name suggests addition polymers form when an addition reaction occurs. A vast majority of biodegradable polymers studied belongs to the polyester family, which includes polyglycolides and polylactides. Examples of thermosetting plastics include bakelite, urea-formaldehyde resins. Can you explain this answer? Multiple Choice Questions. Differentiate between biopolymers and biodegradable polymers and give examples of each type. Monosaccharides are composed of carbon, hydrogen, and oxygen. Polymers of commercial importance . In the following section, the classification of polymers is done using different methods. Biological polymers are large molecules composed of many similar smaller molecules linked together in a chain-like fashion. Carbohydrate monomers called monosaccharides are composed of units of glucose and fructose. Biodegradable polymers, typically a combination of polylactic acids (PLA) and polyglycolic acid (PGA) of various forms, are currently being used in the human body as fixation devices in the form of screws, pins, meshes, etc., to protect the healing of fractured bones. When small organic molecules are joined together, they can form giant molecules or polymers. Which of the following monomers form biodegradable polymers? The groups of atoms or molecules that interconnect to form a polymer are known as monomers. Lipids are similarly made of fatty acids and glycerol. Polymers are considered as macromolecules owing to their massive molecular mass. Which of the following monomers form biodegradable polymers? Extraordinary progress has been made in the development of practical processes and products from polymers such as starch, cellulose, and lactic acid. (A) 3-hydroxybutanoic acid + 3-hydroxypentanoic acid (B) Glycine + amino caproic acid (C) ethylene glycol + phthalic acid (D) both a and b. PHBV is Poly β-hydroxy butyrate-co- β-hydroxy valerate .It is a biodegradable polymer. Such polymers although biodegradable will not be of any use as a solution to MPs and should not be given the classification of being biodegradable for any environmental application. Ans. Synthetic polymers do not degrade in the environment for a long time. Which of the following monomers form biodegradable polymers? Question 17. Students can solve NCERT Class 12 Chemistry Polymers MCQs Pdf with Answers to know their preparation level. In this chapter, you will study the various types of polymers that we use in daily life. Demonstrates acceptable shelf life. E.Ann MacGregor, in Encyclopedia of Physical Science and Technology (Third Edition), 2003. II.E Polymer-Polymer Interactions. 1. 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