A-LevelChemistryHydrocarbons9701/12 · Oct/Nov 2012 · Q251 Mark

One of the reactions taking place in a catalytic converter in a car exhaust system is between nitrogen oxide and octane (unburned petrol). The products of this reaction are non-toxic. Which is the correct equation for the reaction?

AC8H16 + 16NO → 8CO + 8N2 + 8H2O

BC8H16 + 24NO → 8CO2 + 12N2 + 8H2O

CC8H18 + 17NO → 8CO + 8 ½ N2 + 9H2O

DC8H18 + 25NO → 8CO2 + 12 ½ N2 + 9H2O

✓ Correct answer

D: C8H18 + 25NO → 8CO2 + 12 ½ N2 + 9H2O

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Topic: Hydrocarbons, A-Level Chemistry (syllabus 9701). Multiple choice, 1 mark.
Source: A-Level Chemistry, Oct/Nov 2012 Paper 1 Variant 2, question 25.

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