Particulate matter is not involved in the chemical reaction, which produces smog.
• The air pollution, which diminishes visibility is smog.
• The majority of the smog that one sees today is the photochemical smog.
• It is generated when sunlight reacts with atleast one volatile compound and nitrogen oxides in the atmosphere.
• The nitrogen oxides come from coal power plants, factory emissions, and car exhaust.
• The volatile compounds are discharged from paints, gasoline, and many cleaning solvents. When sunlight react with these chemicals, they produce ground level ozone or smog and airborne particles.
• The mixture of solid particles and liquid droplets found in the air is known as the particulate matter.
• The particulate matter has no role in the production of smog.
Thus, the correct answer is option b, that is, particulate matter.
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