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Chemistry
Grade-6
Easy
Question
Identify the compound which acts as secondary pollutants of air from the following.
Carbon monoxide
Sulfur trioxide
Nitrogen oxide
Sulfur dioxide
Hint:
A secondary pollutant is not directly emitted as such, but forms when other pollutants react in the atmosphere.
The correct answer is: Sulfur trioxide
Sulfur trioxide is a compound that acts as a secondary pollutant in the air. As sulfur trioxide is made when sulfur dioxide reacts with water in the air.