zeolite catalyst * C10H22 (l) --- C8H18 (l) + C2H4 (g) 1C – identify that ethylene‚ because of the high reactivity of its double bond‚ is readily transformed into many useful products * First member of homologous series of straight chain alkenes (C2H4) * Functional group = highly reactive double C=C bond * Readily transformed into many useful compounds ( polyethylene) through addition reactions * Examples: ethylene oxide (CH2)2O -> sterilizer Ethanol
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Revision checklist for IGCSE Chemistry 0620 A guide for Students Revision checklist for IGCSE Chemistry 0620 A guide for students How to use this guide The guide describes what you need to know about your IGSCE Chemistry examination. It will help you to plan your revision programme for the theory examinations and will explain what the examiners are looking for in the answers you write. It can also be used to help you to revise by using tick boxes in Section 3‚ ‘What you need to know’‚ to check
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Study Guide: Exam 1 1. What type(s) of molecular motion is (are) observed using infrared spectroscopy? A. Stretching and bending B. Rotation and excitation C. Spin flipping D. Fragmentation 2. The functional group region of an infrared spectrum is A. where the cations appear. B. >1500 cm-1. C. <1500 cm-1. D. >2500 cm-1. 3. Stronger bonds will be found where in the infrared spectrum? A. Higher molecular weight B. Lower molecular weight C. Lower wavenumbers D. Higher wavenumbers 4. Compared
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CE : Section 5 Fossil Fuels 1. 93 1(c) Alkenes can be obtained from petroleum fractions by a process called ’cracking’. Using a suitable petroleum fraction‚ a student carried out this process in the laboratory and collected the gaseous product over water. (i) What is ’cracking’ ? (ii) Draw a labelled diagram of a laboratory set-up that can be used for carrying out the process and collecting the gaseous product. (iii) An important safety precaution in the experiment is to prevent sucking
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IMPORTANT TOPICS OF CHEMISTRY 2009 Chap No.1 Q.1- Define chemistry & branches of chemistry any three? Q.2-Lrean about history of chemistry for short question and fill in the blanks? Q.3 what is scientific method? Define hypothesis and theory? CHAP NO.2 Q.1-Learns about any three laws of chemical combination only statement and example? Q.2-Define chemical reaction and types of chemical reaction with one example for each with the help of chemical equation? Q.3-Define MOLE‚ Atomic no
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PPV‚ which is the abbreviated term for phenylenevinylene‚ has light emitting properties since it has a large conjugated system. This organic molecule is possible to be formed from dichloro-para-xylene which then reacts with methanol and thiolane. The nucleophile would be the thiolane. A good leaving group in this case would be chlorine. After thiolane attacks‚ it results with dithiolane-xylene. The second step is reaction with sodium hydroxide. The hydroxide it used for deprotonation upon the substituted
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Abstract The bromination of trans-cinnamic acid was completed to determine dibromide’s stereochemical structure and its mechanism. After the addition of bromine to trans-cinnamic acid‚ the product was identified by its melting point and infrared spectrum resulting in erythro-2‚3-Dibromo-3-phenylpropanoic acid after comparing similar properties. Introduction In this lab‚ the bromination of trans-cinnamic acid was completed to determine dibromide’s stereochemical structure‚ and from there determine
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Caroline Guidry Dr. Beverly A. Clement Organic Chemistry 2423‚ Section 304 25 October 2017 Lab 6: Natural Products I The main goal of this experiment was to employ isolation techniques to derive chemicals from two different natural sources and study their properties (Clement 91). The two natural sources used in this experiment were an orange (the peel contains limonene‚ which is a terpene) and a dichloromethane solution of clove oil (which contains eugenol‚ an acetogenin). To isolate the eugenol
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have a group attached that is not easily named as a substituent‚ the benzene ring is often treated as a group to this substituent. The benzene ring attachment is called a phenyl group. The compound is named according to the rules for naming alkanes‚ alkenes and alkynes. Trivia: Phenyl comes from “phene”‚ a European term used during the 1800’s for benzene. Example: CH2 = CH – CH – CH3 3- Phenyl-1-butene Substituted benzene: position and name substituent/s (alphabetical) + benzene Note 1:
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attraction between two molecules‚ pulling them together (also known as London dispersion forces). The magnitude pof Van der Waals force depends on the relative molecular mass‚ high mass produces a larger force. Boiling points of the alkanes data and alkenes data These very clearly illustrate the effect of increasing Van der Waals attractions as the relative molecular mass increases. The influence of branching in the alkanes can also illustrate the effect of different surface areas on the Van der Waala
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