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Question
Which of the following is a secondary pollutant?
Options
CO
NO
SO2
SO3
MCQ
Solution
SO3
Explanation:
SO2, a primary air pollutant, reacts with O2 to produce SO3, a secondary air pollutant.
\[\ce{2SO2 + O2 → 2SO3}\]
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Atmospheric Pollution - Tropospheric Pollution - Gaseous Air Pollutants
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