AQA Jan 2011 Paper 1 Q4

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do not write outside the box cetane c h is a major component of diesel fuel a write an equation to show the complete combustion of cetane mark b cetane has a melting point of oc and a boiling point of oc in polar regions vehicles that use diesel fuel may have ignition problems suggest one possible cause of this problem with the diesel fuel mark c the pollutant gases no and no are sometimes present in the exhaust gases of vehicles that use petrol fuel c i write an equation to show how no is formed and give a condition needed for its formation equation condition marks c ii write an equation to show how no is removed from the exhaust gases in a catalytic converter identify a catalyst used in the converter equation catalyst marks c iii deduce an equation to show how no reacts with water and oxygen to form nitric acid hno mark wmp jan chem do not write outside the box d cetane c h can be cracked to produce hexane butene and ethene d i state one condition that is used in this cracking reaction mark d ii write an equation to show how one molecule of cetane can be cracked to form hexane butene and ethene mark d iii state one type of useful solid material that could be formed from alkenes mark turn over for the next question turn over wmp jan chem

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