AQA Jan 2010 Paper 2 Q9

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section b answer all questions in the spaces provided areas outside the box will not be scanned for marking there are four isomeric alcohols with the molecular formula c h o a two of these are butan l ol ch ch ch ch oh and butan ol the other two isomers are alcohol x and alcohol y draw the displayed formula for butan ol alcohol x does not react with acidified potassium dichromate vi solution give the structure of alcohol x name the fourth isomer alcohol y marks extra space wmp jan chem b the infrared spectrum of one of these isomeric alcohols is given below areas outside the box will not be scanned for marking transmittance wavenumber cm identify one feature of the infrared spectrum which supports the fact that this is an alcohol you may find it helpful to refer to table on the data sheet explain how infrared spectroscopy can be used to identify this isomeric alcohol marks extra space question continues on the next page turn over wmp jan chem c british scientists have used bacteria to ferment glucose and produce the biofuel butan l ol areas outside the box will not be scanned for marking write an equation for the fermentation of glucose c h o to form butan l ol carbon dioxide and water only state one condition necessary to ensure the complete combustion of a fuel in air write an equation for the complete combustion of butan l ol and state why it can be described as a biofuel marks extra space wmp jan chem d butan l ol reacts with acidified potassium dichromate vi solution to produce two organic compounds areas outside the box will not be scanned for marking state the class of alcohols to which butan l ol belongs draw the displayed formula for both of the organic products state the type of reaction that occurs and the change in colour of the potassium dichromate vi solution marks extra space turn over for the next question turn over wmp jan chem

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