A-LevelChemistryNitrogen and sulfur9701/12 · Oct/Nov 2025 · Q161 Mark
Oxides of nitrogen, NOx, are involved in formation of photochemical smog and acid rain. Which oxides of nitrogen are involved in each of these processes?
Aphotochemical smog: NO (✓), NO2 (✓); acid rain: NO (✓), NO2 (✓)
Bphotochemical smog: NO (✗), NO2 (✓); acid rain: NO (✗), NO2 (✓)
Cphotochemical smog: NO (✓), NO2 (✓); acid rain: NO (✗), NO2 (✓)
Dphotochemical smog: NO (✗), NO2 (✓); acid rain: NO (✓), NO2 (✓)
✓ Correct answer
A: photochemical smog: NO (✓), NO2 (✓); acid rain: NO (✓), NO2 (✓)
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