Computer · Environmental Engineering
Photochemical smog is brown in colour and is often called 'brown air smog'. This distinct brown colour is primarily due to the presence of:
Verified Solution4 OptionsUpdated: October 2026👁️1 View
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- 1Nitrogen oxides (NOx, specifically NO2)✓
- 2Sulphuric acid mist (H2SO4)
- 3Carbon dioxide (CO2)
- 4Sulphur oxides (SOx)
Correct answer
Nitrogen oxides (NOx, specifically NO2)
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