O-LevelChemistryChemistry of the Environment5070/11 · May/June 2023 · Q311 Mark
Dissolved substances can cause eutrophication and the deoxygenation of water. How many of the ions shown cause this effect? Cl⁻ CO3²⁻ Na⁺ NO3⁻ PO4³⁻
A1
B2
C3
D4
✓ Correct answer
B: 2
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