Sure! Here are five gases for each specified case:
Can be used for fountain experiment:
- Carbon Dioxide (CO₂)
- Oxygen (O₂)
- Hydrogen (H₂)
- Nitrogen (N₂)
- Ammonia (NH₃)
Can be collected by downward delivery:
- Carbon Dioxide (CO₂)
- Chlorine (Cl₂)
- Hydrogen Chloride (HCl)
- Ammonia (NH₃)
- Sulfur Dioxide (SO₂)
Can be used as refrigerant:
- Refrigerant-12 (Dichlorodifluoromethane, CCl₂F₂)
- Refrigerant-134a (Tetrafluoroethane, C₂H₂F₄)
- Ammonia (NH₃)
- Carbon Dioxide (CO₂)
- Hydrofluorocarbons (HFCs) like R-404A
Decolourize acidified KMnO₄:
- Sulfur Dioxide (SO₂)
- Hydrogen Peroxide (H₂O₂)
- Ethylene (C₂H₄)
- Carbon Monoxide (CO)
- Bisulfite ions (from SO₂ or NaHSO₃)
Decolourize bromine in water:
- Sulfur Dioxide (SO₂)
- Hydrogen Sulfide (H₂S)
- Ethylene (C₂H₄)
- Alkene gases (like Propylene, C₃H₆)
- Acetylene (C₂H₂)
Feel free to ask if you need any more information!