It covers all the important topics you need to learn to improve your grades in the aqa, edexcel, ocr gateway and ocr 21st century exams. Just pick a topic and the clock starts ticking you have 60 seconds to answer as many multiplechoice questions as you can. Polythene polyethene is made by forming a long chain of ethene molecules. Cgps gcse science range is packed to the rafters with everything you need for the grade 91 courses. Please do not copy or use these images, notes and solution on any other websites or do not use them for any. This is the reaction between a double or triple bond in which further units are added to the atoms with the double bond between them, changing the double bond to a single bond in the process. They are formed when many small molecules join together. I dont know about nonscience subjects, because i only used the science ones, and i dont know about alevel cgp again, because i dont use it, but it is perfect for science gcse thats a relief. The whole things designed to make revision straightforward everything you need to know is explained simply and thoroughly, helped by fullcolour diagrams. Each polymer molecule is a long chain of mainly carbon atoms polymers are made from many smaller molecules, called monomers. Gcse bitesize examinations general certificate of secondary education specimen paper science a21202 modules b2 p2 c2 higher tier marking scheme unless otherwise stated, correct answers only should be accepted.
Support site for pearsons edexcel international gcse chemistry books. And remember this the longer the polymer chain is, the more tangled up it can get. Structure of polymers thermosoftening thermosetting. Does anyone no where i can get free cgp science gcse books from. May 02, 2020 polymers class notes, chemistry, class 12, cbse, ncert class 12 notes edurev is made by best teachers of class 12. A wide variety of unsaturated monomers may be used, to yield polymers with. This is because the polymer chains can bunch up and stick together to make them almost unbreakable. If you really do not feel like it then tell yourself that you will only do it for 20 minutes and then decide whether to carry on or not. What can be done about the major concerns of our global economy on energy, global warming, sustainable development, userfriendly processes, and green chemistry.
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Geopolymers the reaction of alkaline solution usually hydroxides or alkali metal silicates with solid aluminosilicates can produce a group of cementitious binders called geopolymer cement. Low density polyethene is a transparent polymer of moderate tensile strength and high toughness. Polymers class notes, chemistry, class 12, cbse, ncert. Polymers are long chained molecules formed by joining together many small reactive molecules called monomers mono and mer, meaning one part. Perspex is a synthetic polymer whose structure is also amorphous. Grade 89 targeted exam practice workbook with answers cgp igcse 91 revision by cgp books nov 30, 2018 5. It shows the name of the product as polyethene whereas the. They can bend and twist and even get tangled up just like a ball of string.
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In science, the word plastic refers to a specific type of deformation. Gcse science chemistry 91 bonding in polymers youtube. Its packed with hundreds of quickfire questions, all matched to the aqa course perfect for learning on the go. Polymers are long chained molecules formed by joining together many small reactive molecules called monomers mono and mer, meaning one part polymers are macromolecules due to their very large sizes and high molecular masses. Lecture notes polymer engineering materials science and. If youre a school or an individual customer in the. Learning about complex molecules, like polymers, can feel overwhelming, but this lesson plan on natural and synthetic polymers can help teachers illustrate these topics.
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Edexcel cc7a molecular compounds teaching resources. I set up this site to help my own revision, and of course yours. Well, i was a 10th grader say hi below if you want to find out what im up to now. Every topic is explained with clear, succinct study notes, examples and diagrams and there are practice questions at the end of every page to test you on what youve learned with answers and mark schemes included. You will find science, chemistry, formulas and very practical information including patents excerpts covering. Alkenes are reactive and so are useful for making many other substances including polymers polymers have very large molecules. The word polymer is derived from the latin words poly, meaning many, and mer meaning parts. Find materials for this course in the pages linked along the left. Sc polymer science colleges in india list of master. Master the concepts of polymers and classification of polymers including elastomers, thermoplastic and thermosetting polymers, straight chain and cross linked polymers and natural and synthetic polymers with the help of study material for iit jee by aski. A monomer is the building block or in other words the repeating unit that is used to make the polymer. Browse cgps bestselling secondary 91 gcse and igcse science books for combined science, biology, chemistry and physics. This book is full of clear notes and examstyle practice questions covering every as chemistry topic for the edexcel exam board. Like all mechanisms it is categorised according to the mode of chemical attack by the reagent plus the overall effect of the reaction.
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