O-LevelChemistryChemistry of the Environment5070/11 · May/June 2012 · Q321 Mark

Which pair of gases could be removed from the atmosphere using calcium carbonate?

ACO2 and O3

BCO and SO2

CCH4 and NO2

DNO2 and SO2

✓ Correct answer

D: NO2 and SO2

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Topic: Chemistry of the Environment, O-Level Chemistry (syllabus 5070). Multiple choice, 1 mark.
Source: O-Level Chemistry, May/June 2012 Paper 1 Variant 1, question 32.

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