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O-LevelChemistryChemistry of the Environment5070/11 · May/June 2012 · Q201 Mark

A sample of air was bubbled into water. The pH of the water slowly changed from 7 to 6. Which gas in the sample caused this change?

Acarbon dioxide
Bcarbon monoxide
Cnitrogen
Doxygen

✓ Correct answer

A: carbon dioxide

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About this question

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 20.

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