AQA Jan 2010 Paper 1 Q4

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pmt areas outside the box will not be scanned for marking alkanes are saturated hydrocarbons which can be obtained from crude oil pentane is an example of an alkane a molecule of pentane contains five carbon atoms a i state the meaning of the term saturated and of the term hydrocarbon as applied to alkanes saturated hydrocarbon marks a ii give the general formula for the alkanes mark b pentane burns completely in oxygen b i write an equation for this reaction mark b ii state how the products of this reaction may affect the environment mark c give the name of a solid pollutant which may form when pentane burns incompletely in air mark wmp jan chem pmt areas outside the box will not be scanned for marking d one molecule of c h can be cracked to form one molecule of pentane and one other product i write an equation for this cracking reaction d d mark ii suggest a type of compound that can be manufactured from the other product of this cracking reaction mark d iii state why a high temperature is needed for cracking reactions to occur mark question continues on the next page turn over wmp jan chem e pentane can react to form the following haloalkane q pmt areas outside the box will not be scanned for marking h h c br c h c h h h h c h br c cl e i name q mark e ii state the type of structural isomerism shown by q and the haloalkane shown below br h c h ch cl h c c h c br mark wmp jan chem

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