AQA Jun 2015 Paper 2 Q8

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section b do not write outside the box answer all questions in the spaces provided consider the following scheme of reactions ch reaction ch h c c ch ch h c c chcl ch reaction ch ch ch reaction h c c ch nh ch ch a give the iupac name for compound p and that for compound q marks p q wmp jun chem do not write outside the box b the conversion of p into q in reaction uses hcl name and outline a mechanism for this reaction marks c the conversion of q into r in reaction uses nh name and outline a mechanism for this reaction marks question continues on the next page turn over wmp jun chem do not write outside the box d state the type of reaction shown by reaction identify a reagent for this reaction give one condition necessary for a high yield of product when q is converted into p marks e hydrogen bromide hbr could be used in the overall conversion of p into r instead of using hcl hydrogen bromide is made by the reaction of nabr with concentrated phosphoric acid concentrated sulfuric acid is not used to make hbr from nabr write an equation for the reaction of nabr with h po to produce hbr and na po only identify two toxic gases that are formed together with hbr when nabr reacts with concentrated h so state the role of h so in the formation of these two toxic gases marks wmp jun chem

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