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List three gases in each case that can be used:

1.For fountain experiment
2Can be collected by downward delivery
3.can be used as refrigerant
4.decolourize acidified KMnO4
5Decolourize bromine water

1 answer

Sure! Here are three gases for each category you've mentioned:

  1. For fountain experiment (typically gases that can dissolve in water):

    • Carbon dioxide (CO₂)
    • Ammonia (NH₃)
    • Hydrogen chloride (HCl)

  2. Can be collected by downward delivery (gases that are denser than air):

    • Carbon dioxide (CO₂)
    • Sulfur dioxide (SO₂)
    • Chlorine (Cl₂)

  3. Can be used as refrigerant:

    • Chlorofluorocarbons (CFCs, e.g., R-12)
    • Hydrofluorocarbon (HFC, e.g., R-134a)
    • Ammonia (NH₃)

  4. Decolorize acidified KMnO₄ (usually reducing agents):

    • Sulfur dioxide (SO₂)
    • Hydrogen sulfide (H₂S)
    • Carbon monoxide (CO)

  5. Decolorize bromine water (typically unsaturated hydrocarbons or reducing agents):

    • Ethene (C₂H₄)
    • Alkynes (e.g., acetylene, C₂H₂)
    • Phenol (C₆H₅OH)

Feel free to let me know if you need more information about any of these gases!