WebSep 8, 2024 · Answer. Question 25. The monomers used in addition polymerisation through free radical should be very pure because. (a) the traces of impurities act like inhibitors resulting in short chain polymers. (b) the impurities result in formation of different products. (c) the polymer formed is impure. WebExplain the difference between Buna-N and Buna-S. Solution: Buna-N is a copolymer of 1, 3-butadiene and acrylonitrile and Buna-S is a copolymer of 1, 3-butadiene and styrene. Question 6. Arrange the following polymers in increasing order of their intermolecular forces. Nylon 6,6, Buna-S, Polythene; Nylon 6, Neoprene, Polyvinyl chloride. Solution:
Polymers - Types, Classification, Properties, and Uses …
WebMar 26, 2024 · Hint: The polymers are very large molecules which are made up of many repeating molecular units called monomers. Buna-S, Dacron, Buna-N are condensation polymers and Neoprene is an Addition polymer. Complete step by step answer: 1. Buna-S: Buna-S is called butadiene-styrene copolymer. The monomers of this are: 1,3 … Web1) Buna-S (styrene butadiene rubber) - It is obtained by the polymerization of Buta-1, 3 -diene and styrene in the ratio of 3:1 in the presence of sodium. It is used for making automobile tyres and footwear. 2) Buna-N (Nitrile rubber)- It is obtained by polymerization of 1,3-butadiene and acrylonitrile in the presence of a peroxide catalyst. how to root euphorbia tirucalli
Chemistry MCQs for Class 12 with Answers Chapter 15 Polymers …
WebMay 3, 2013 · Preparation of Buna-S. -Also known as styrene-butadiene. – Buna-S name is derived from Bu- butadiene and Na- sodium/ natrium and S- styrene. -It is a replacement … WebThese intermediate condensation products are used as resins in different industries. Bakelite is obtained when Novolac is allowed to undergo cross-linking in the presence of a cross-linking agent. In general, phenol taken … WebSep 24, 2024 · Hence nylon 6, 6 is homopolymer. The polymer Buna-S is formed by polymerization of the monomers butadiene and styrene in presence of each other. The repeating units corresponding to the monomers butadiene and styrene are randomly arranged in the polymer. Hence Buna-S is copolymer. Use your brain power! (Textbook … how to root english ivy