AQA AS Jun 2016 Paper 2 Q6

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14Propane-1,2-diol has the structure CH2(OH)CH(OH)CH3. It is used to make polyesters and is one of the main substances in electronic cigarettes (E-cigarettes). A sample of propane-1,2-diol was refluxed with a large excess of potassium dichromate(VI) and sulfuric acid. . 1 Draw the skeletal formula of propane-1,2-diol. [1 mark] . 2 Write an equation for this oxidation reaction of propane-1,2-diol under reflux, using [O] to represent the oxidizing agent. Show the displayed formula of the organic product. [2 marks] 0 6 0 6 *14* M/JUN16/7404/2<br />
 150 6 . 3 Draw a labelled diagram to show how you would set up apparatus for refluxing. [2 marks] 0 6 0 6 . 4 Anti-bumping granules are placed in the flask when refluxing. Suggest why these granules prevent bumping. [1 mark] . 5 Draw the structure of a different organic product formed when the acidified potassium dichromate(VI) is not in excess. [1 mark] *15* Turn overM/JUN16/7404/2<br />

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