O-LevelChemistryChemistry of the Environment5070/11 · May/June 2015 · Q301 Mark

Which two gases do not damage limestone buildings?

Anitrogen and carbon monoxide

Bnitrogen dioxide and carbon monoxide

Cnitrogen dioxide and carbon dioxide

Dsulfur dioxide and carbon dioxide

✓ Correct answer

A: nitrogen and carbon monoxide

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Topic: Chemistry of the Environment, O-Level Chemistry (syllabus 5070). Multiple choice, 1 mark.
Source: O-Level Chemistry, May/June 2015 Paper 1 Variant 1, question 30.

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