Essential Chemistry for IGCSE - Air And Water (Section 6 - No. 2)
Which of the following compounds does NOT contribute to acid rain?
Sulfur dioxide (SO2)
Nitrogen oxides (NOx)
Carbon dioxide (CO2)
Water vapor (H2O)
Explanation
The text indicates that sulfur dioxide and nitrogen oxides are main components in acid rain. Water vapor, in its pure form, does not contribute.
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