AQA Jun 2015 Paper 2 Q6

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do not write outside the box a butane and propanal are compounds with mr calculated using data from your periodic table a mass spectrometer can be used to distinguish between samples of butane and propanal table shows some precise relative atomic mass values table atom precise relative atomic mass h c a i use data from table to show that to significant figures a more accurate value for the mr of butane is mark a ii state why the precise relative atomic mass quoted in table for the c isotope is exactly mark question continues on the next page turn over wmp jun chem do not write outside the box b draw a displayed formula for the organic product that is formed when propanal is oxidised by warm tollens reagent mark c prop en ol is an isomer of propanal and can be polymerised to form a polymer represented by the following structure n ch oh c i draw the structure of prop en ol mark c ii deduce the type of polymerisation that results in the formation of this polymer from prop en ol mark wmp jun chem do not write outside the box c iii there are two functional groups in prop en ol each of these functional groups contains a bond with a characteristic absorption range in the infrared spectrum use table a on the data sheet to suggest a bond and its absorption range for each of the two functional groups marks bond absorption range bond absorption range d compound x is another isomer of propanal the infrared spectrum of x shows an absorption in the range cm d i draw the structure of x mark d ii which of the following a b c or d represents the type of isomerism shown by x and propanal write the correct letter a b c or d in the box a b c d chain isomerism e z isomerism functional group isomerism position isomerism mark turn over wmp jun chem

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