O-LevelChemistryChemistry of the Environment5070/11 · May/June 2019 · Q311 Mark
Some atmospheric pollutants are listed. 1 sulfur dioxide 2 methane 3 nitrogen dioxide 4 unburned hydrocarbons Which substances could be removed by reacting with calcium carbonate?
A1 and 2
B1 and 3
C2 and 4
D3 and 4
✓ Correct answer
B: 1 and 3
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