Choose your answers to the questions and click 'Next' to see the next set of questions. Why are alkenes more reactive than alkanes? C. Our team of exam survivors will get you started and keep you going. Cyclohexane. Which of the following is not an alkane or alkene? Which is a correct statement about incomplete combustion? Select the two uses that is most appropriate for low density poly(ethene), LDPE. A level chemistry AQA specification: 3.2.9 - Alkenes. The chemistry of the test. Iodine does not react with alkenes at all. Alkanes are saturated hydrocarbons. It is when the atoms of a compound are arranged in a haphazard manner. understand the use of alkenes in the production of organic compounds; understand what is meant by addition polymerisation; Alkenes Alkenes are unsaturated compounds with a C=C double bond. Combustion of alkanes Combustion with oxygen is the most important reaction of alkanes giving their immediate use as fuels: The burning of fossil fuels such as alkanes provides society with many environmental problems, some of which are listed below. The high electron density of the double bond makes alkenes more reactive than alkanes. Which of the following statements about alkene is FALSE? Which of the following is true about polyunsaturated fats? Alkenes with 20 carbons are most likely waxy solids. By Pohweixuan | Last updated: Jul 3, 2019. Oxidation of alkenes with hot concentrated acidified potassium manganate(VII) solution The diols, such as ethane-1,2-diol, which are the products of the reaction with cold dilute potassium manganate(VII), are themselves quite easily oxidized by manganate(VII) ions. to them later with the "Go To First Skipped Question" button. The number of carbon atoms in total in the compound. Two common types of unsaturated compounds are alkenes and alkynes, characterized by the carbon-carbon double and triple bond, respectively, as the functional group. What is the name of the alkane which has the formula C4H10? When you have completed the practice exam, a green submit button will It is when compounds contain the same elements of different isotypes. All other trademarks and copyrights are the property of their respective owners. Which of the following is most likely NOT an alkene based on the name? Which of the following is true about alkanes? Which of the following is / are characteristic of a homologous series of organic compounds? There are no simple direct ways to prepare solid derivatives of unsaturated aliphatic compounds having no other functional groups. In addition polymerization, how many products are formed? What is the name of the alkane which has the formula C, There are some C=C double bonds present in the molecule, All C atoms are bonded by single covalent bonds, Poisonous carbon monoxide may be produced, It releases more energy than complete combustion, The bonds between the atoms are weaker in alkenes, Home Economics: Food and Nutrition (CCEA). What is needed in order for chlorine to react with ethane in a substitution reaction? © copyright 2003-2020 Study.com. They have a higher melting point relative to polysaturated fats. The number of carbon atoms that will branch out from the compound. Name the test used to determine where an alkene is present. It involves heat, great pressure and the presence of a catalyst. An organic compound that contains at least one carbon to carbon double bond, is known as a(n): Which of the following is true of Markovnikov's Rule? When hydrocarbons like the alkanes burn in plenty of air, what type of reaction takes place? Propene. 1. Click it to see your results. Contact us by phone at (877) 266-4919, or by mail at 100 View Street #202, Mountain View, CA 94041. Premium members get access to this practice exam along with our entire library of lessons taught by subject matter experts. Why is poly(propene) used to make syringes? Water adds to reactive alkenes in the presence of an acid to form alcohol. Earn Transferable Credit & Get your Degree. Positional isomerism 8. Manufacture of alcohols. Take this quiz to challenge yourself and test your knowledge on Alkanes and Alkenes! to them later with the "Go To First Skipped Question" button. They lack hydrogen atoms on their molecules. Name the test used to determine where an alkene is present. Take this practice test to check your existing knowledge of the course material. Alkenes can be persuaded to add water in the presence of a catalyst in a reaction very similar to … The chains in LDPE are highly branched while in HPDE the chains have little branching. You can skip questions if you would like and come Why the test for saturation works Bromine can add across the double bond in an addition reaction, forms a colourless dibromo compound Details for addition reaction with alkenes and hydrogen halides Read about our approach to external linking. In the manufacturing on ethanol, which of the following statements is true? AQA A-Level Chemistry: Alkenes Chapter Exam Take this practice test to check your existing knowledge of the course material. You can skip questions if you would like and come What does this mean? When you have completed the practice exam, a green submit button will B. How is low density polyethylene (LDPE) different from high density polyethylene (HDPE)? It is the process of breaking down a large molecule into smaller molecules. Alkenes decolourise bromine water. Plastic carrier bags and garden furniture. appear. on your results. Sciences, Culinary Arts and Personal Looking at the chemical formulae of these compounds, which is an alkane? Alkenes make gasoline additives that typically do not improve octane rating. Because poly(propene) is a hard substance. Which of the following statements is incorrect? 2.2.3 Addition of Water. The chains in LDPE are held by weak Van Der Waals forces while in HPDE the chains are held by strong covalent bonds. The oxygen in the water attaches to a positive carbon atom. Alkanes are useful as fuels and alkenes are used to make chemicals such as plastic. Which of the following is / are true of the process of Polymerisation? Which alkene is most likely in the gaseous state? Based on your results, we'll create a customized Test Prep Plan just for you! This is complicated by the fact that the major product isn't 1,2-dibromoethane. Removing question excerpt is a premium feature. Their melting and boiling points decrease down the group, They are linked together exclusively by single bonds. Alkenes can be used to make gasoline additives. What would be best to use in make dishwasher safe food containers? Plastic carrier bags and squeeze bottles.

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