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Which among the following is known as a Secondary Pollutant in the atmosphere?

  1. Ozone 
  2. Sulfur dioxide
  3. Nitrogen Oxides 
  4. Carbon Monoxide 

Answer (Detailed Solution Below)

Option 1 : Ozone 
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Detailed Solution

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The correct answer is Ozone

Key Points

  • A Primary Pollutant is a pollutant that emerges directly from any source whereas a secondary pollutant is formed when the primary pollutants react in the atmosphere. 
  • Ozone is an example of secondary pollutant since it is formed when nitrogen oxides and hydrocarbons combine in the presence of sunlight. 

Additional Information

  • Carbon monoxide is a primary pollutant. 
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