OCR A Jun 2009 Paper 2 Q5

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5 Alcohols A, B, C and D are shown below. 10 CH3 CH3 CH3 CH2 OH OH CH3 CH2 CH2 OH H3C OH CH3 CH3 (a) Compound A is ethanol, a very useful alcohol. Identify the two main methods used in the industrial production of ethanol. Write an equation for each method. method 1equationmethod 2equation[4] (b) A student heated each alcohol, AD, with acidified potassium dichromate(VI) as the oxidising agent. With alcohols A, B and C, the colour turned from orange to green. (i) Identify the organic product and write a balanced equation for the reaction of alcohol B with acidified potassium dichromate(VI). Use [O] to represent the oxidising agent, acidified potassium dichromate(VI). organic product: balanced equation:OCR 2009 [2]<br />
 (ii) The organic product obtained from C was analysed by infrared (IR) spectroscopy. The IR spectrum of the product is shown below. 11 100 transmittance (%) 50 0 4000 3000 2000 1500 wavenumber / cm1 1000 500 Use your Data Sheet to identify the organic product. Explain your reasoning. organic product: reasoning[3] (c) The student heated alcohol D with ethanoic acid in the presence of an acid catalyst. An organic product E was formed with a fruity smell. (i) Name alcohol D.[1] (ii) Name the functional group in the organic product E.[1] (iii) Draw the structure of the organic product E.OCR 2009 [2] [Total: 13] Turn over<br />

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