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Smog is mainly due to the presence of which of the following?

1. Oxides of sulphur and nitrogen
2. Oxygen and nitrogen
3. Oxygen and ozone
4. Ozone and nitrogen

Correct answer: Oxides of sulphur and nitrogen

Solution

Smog is primarily caused by the chemical reactions between oxides of sulfur and nitrogen, which are released from industrial processes and vehicle emissions, leading to the formation of particulate matter and other pollutants that contribute to smog.

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