Question : Which of the following is not a gaseous air pollutant?
Option 1: Oxides of Nitrogen
Option 2: Hydrogen
Option 3: Smoke
Option 4: Oxides of Sulphur
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Correct Answer: Hydrogen
Solution : The correct option is Hydrogen .
Hydrogen is not a gaseous air pollutant. In the context of typical air quality concerns, it is not typically considered an air contaminant, despite being a gas. Naturally occurring in the environment in minuscule proportions is hydrogen, both an element and a gas.
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