B) modifying a naturally occurring polymer to form celluloid. Can you explain this answer? Which of the following is an environmental issue associated with burning polymers to dispose of them? The monomers combine to form a … POLYMERS Short Answer Questions: **1.What is PHBV? Polymers are very large molecules made when many smaller molecules join together, end to end. Which of the following monomers form biodegradable polymers? Alkenes can be used to make polymers. Phenol and formaldehyde undergo condensation to give a polymar (A) which on heating with formaldehyde gives a thermosetting polymer (B). Extraordinary progress has been made in the development of practical processes and products from polymers such as starch, cellulose, and lactic acid. The groups of atoms or molecules that interconnect to form a polymer are known as monomers. In general, biodegradable polymers break down to form gases, salts, and biomass. C. 3-hydroxybutanoic and 3-hydroxypentanoic acid. Which of the following monomers form biodegradable polymers? In the following section, the classification of polymers is done using different methods. (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. 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. Is easily processable into the final product form. Biodegradable polymers. Amino acids Monosaccharides Nucleotides. Answer. Classification of polymers During addition Repeating units of two polymers, P and Q, are shown in the figure below. Biopolymers are natural polymers produced by the cells of living organisms.Biopolymers consist of monomeric units that are covalently bonded to form larger molecules. Ethylene glycol and terephthalic acid. Monomer: A monomer can be defined as a molecule, which acts as a basic unit for the synthesis of polymers. [20] The breakdown of these polymers depend on a variety of factors including the polymer and also, the environment the polymer is in. Polymers of commercial importance . Polymers. Proteins Carbohydrates Nucleic acids. Lipids are similarly made of fatty acids and glycerol. Physics. Question 17. The repeating monomers form a linear or branch structure depending on the type of monomer. The first attempts to make synthetic polymers involved A) combining monomers of ethylene to form polyethylene. (i) 3-hydroxybutanoic acid + 3-hydroxypentanoic acid (ii) Glycine + amino caproic acid (iii) Ethylene glycol + … C) compression molding. NCERT DC Pandey Sunil Batra HC Verma Pradeep Errorless. Students can solve NCERT Class 12 Chemistry Polymers MCQs Pdf with Answers to know their preparation level. Match the following polymers with their monomers. )Write the names and structures of monomers of the following polymers? 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. Which of the following monomers form biodegradable polymers? Biology. By incorporating drug into the biodegradable polymers, the dosage forms releases the drug for a long period of time and can be … Multiple Choice Questions. Biodegradable polymers are designed to degrade upon disposal by the action of living organisms. Chemistry. (A) 3-hydroxybutanoic acid + 3-hydroxypentanoic acid (B) Glycine + amino caproic acid (C) ethylene glycol + phthalic acid (D) both a and b. As a result, biodegradable polymers offer a novel approach for developing sustained release drug delivery systems that are simple and convenient to patient. Polymers are considered as macromolecules owing to their massive molecular mass. These plastics cannot be softened again on heating. Books. Differentiate between rubbers and plastics on the basis of intermolecular forces. Write the names and structures of the monomers of the following polymers: (i) Buna-S (ii) Buna-N (iii) Dacron (iv) Neoprene II.E Polymer-Polymer Interactions. Biodegradable polymers are highly desirable in their conditions as they degrade in the body to biologically inert and compatible molecules. How is it useful to man? 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. Polymers have a high molecular mass (10 3 − 10 7 u).In a polymer, various monomer units are joined by strong covalent bonds. 21. In addition polymer, monomer used is (A) unsaturated compounds (B) saturated compounds (C) bifunctional saturated compounds 6. Synthetic polymers are mostly non-biodegradable i.e., it is very difficult to dispose off the polymeric waste, e.g., polythene bags. Ans. A vast majority of biodegradable polymers studied belongs to the polyester family, which includes polyglycolides and polylactides. 3-hydroxybutanoic and 3-hydroxypentanoic acid. 53. Polymers are usually non-biodegradable. Differentiate between biopolymers and biodegradable polymers and give examples of each type. Answer: (d) 7. 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