AQA Jan 2012 Paper 1 Q3

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do not write outside the box hexane c h is a member of the homologous series of alkanes a i name the raw material from which hexane is obtained mark a ii name the process used to obtain hexane from this raw material mark b c h has structural isomers b i deduce the number of structural isomers with molecular formula c h write the number in this box space for working mark b ii state one type of structural isomerism shown by the isomers of c h mark c one molecule of an alkane x can be cracked to form one molecule of hexane and two molecules of propene c i deduce the molecular formula of x mark wmp jan chem do not write outside the box c ii state the type of cracking that produces a high percentage of alkenes state the conditions needed for this type of cracking type of cracking conditions marks c iii explain the main economic reason why alkanes are cracked mark d hexane can react with chlorine under certain conditions as shown in the following equation c h cl c h cl hcl d i both the products are hazardous the organic product would be labelled flammable suggest the most suitable hazard warning for the other product mark d ii calculate the percentage atom economy for the formation of c h cl mr in this reaction mark e a different chlorinated compound is shown below name this compound and state its empirical formula ch ch cl cl ch name empirical formula marks turn over wmp jan chem

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