Check the below NCERT MCQ Questions for Class 12 Chemistry Chapter 15 Polymers with Answers Pdf free download. The vaporized melamine acts as an inert gas source diluting the oxygen and the fuel gases present at the point of combustion. For example, melamine has an annual replacement rate of around 10 to 20%, whereas china has a replacement rate between 50 and 150%. The polymer sample contains chains of varying lengths, therefore, its molecular mass is always expressed as an average. Melapur … TCC’s Melamine is an organic compound that is often combined with formaldehyde to produce melamine resin, a synthetic polymer that is fire resistant and heat tolerant. Natural rubber: Natural rubber is a linear polymer … The resin is a versatile material that has a highly stable structure. A) Melamine B) Polythene C) Nylon D)… Get the answers you need, now! Plus, melamine is relatively resistant to scratch … Melamine – formaldehyde polymer: Melamine formaldehyde polymer isformed by the condensation polymerisation of melamine and formaldehyde; It is used in the manufacture of unbreakable crockery. Melamine … Examples of suitable polymers: all nitrogenbased polymers such as polyamide 66, 6, 11, 12, thermoplastic polyurethane and polyurethane. Its uses include whiteboards, floor tiles, kitchenware, fire retardant fabrics and commercial filters. Melamine is a weak base, which can form well-defined, thermally stable salts, with both organic and inorganic acids. Polymers are long chain molecules. We have provided Polymers … 73. MCQ Questions for Class 12 Chemistry with Answers were prepared based on the latest exam pattern. The salts, having been found to possess flame retardant characteristics, and for that reason, commonly used in practice for improving polymer fire behavior, are melamine cyanurate, melamine phosphate, and melamine … Melamine resin or melamine formaldehyde (also shortened to melamine) is a resin with melamine rings terminated with multiple hydroxyl groups derived from formaldehyde.This thermosetting plastic material is made from melamine … We report the first example of a successful preparation of a microporous organic polymer within the droplet phase of an inverse non‐aqueous miniemulsion. Give the likely structure of the polymer obtained in each of the following reactions. Also, tell whether these reactions are examples of chain-reaction or step-reaction polymers. List of polymers with their uses is helpful in the academic and competitive exam preparations which will also enhance your knowledge. Which of the following is an example of a heavily cross linked polymer? a). 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