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O-LevelChemistryChemistry of the Environment5070/11 · May/June 2023 · Q301 Mark

What is a cause of deoxygenation of water in a lake?

Aacid rain

Bexcess calcium hydroxide

Cinsoluble nitrates

Dsoluble fertilisers

✓ Correct answer

D: soluble fertilisers

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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 2023 Paper 1 Variant 1, question 30.

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