O-LevelChemistryChemistry of the Environment5070/11 · Oct/Nov 2010 · Q301 Mark

A catalytic converter in a car exhaust system speeds up the change of pollutants into less harmful products. Which change does not occur in a catalytic converter?

Acarbon dioxide → carbon

Bcarbon monoxide → carbon dioxide

Cnitrogen oxides → nitrogen

Dunburned hydrocarbons → carbon dioxide and water

✓ Correct answer

A: carbon dioxide → carbon

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Topic: Chemistry of the Environment, O-Level Chemistry (syllabus 5070). Multiple choice, 1 mark.
Source: O-Level Chemistry, Oct/Nov 2010 Paper 1 Variant 1, question 30.

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