A-LevelChemistryHydrocarbons9701/12 · Oct/Nov 2020 · Q281 Mark

Which statement about the use of alkane fuels in internal combustion engines is correct?

AC₈H₁₈ is used as fuel in internal combustion engines and reacts with oxygen and nitrogen from the air.

BIn limited oxygen, CO is produced which oxidises SO₂ to SO₃ in the atmosphere.

CThe catalytic converter removes polluting gases including NO₂ and CO₂.

DUnburnt hydrocarbons and NO₂ can react in sunlight to produce photochemical smog.

✓ Correct answer

D: Unburnt hydrocarbons and NO₂ can react in sunlight to produce photochemical smog.

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Topic: Hydrocarbons, A-Level Chemistry (syllabus 9701). Multiple choice, 1 mark.
Source: A-Level Chemistry, Oct/Nov 2020 Paper 1 Variant 2, question 28.

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