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Which of the following is an inorganic gaseous pollutant of air ?
1. Hydrogen cyanide
2. Hydrogen sulphide
3. Methane
4. Phosgene

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Correct Answer - Option 2 : Hydrogen sulphide

The correct answer is Hydrogen sulphide.

  • Pollutants like carbon dioxide (CO2), carbon monoxide (CO), sulfur dioxide (SO2), nitrous oxide (NO), and nitrogen dioxide (NO2)Hydrogen sulfide (H2S) are collectively called Inorganic gaseous pollutants.
  • Combustion appliances are the major sources of inorganic gaseous pollutants. They are the by-products of the combustion of the fuel used in the appliances.
  • Sources of Inorganic Gaseous Pollutants are
    • Unvented space heaters
    • Vented space heaters
    • Tobacco products
    • Wood-burning stoves
    • Fireplaces
    • Furnaces
    • Gas stoves
    • Ovens

  • Hydrogen sulfide is used to produce heavy water for nuclear power plants (like CANDU reactors specifically).
  • Phosgene is the organic chemical compound with the formula COCl₂.

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