ammonia
NH3
colourless
High solubility
Hydrogen Chloride
HCL
High solubility
Sulfur Dioxide
So2
High solubility
Chlorine
Cl2
Greenish yellow
High solubility
Carbon dioxide
CO2
Low solubility
Carbon monoxide
CO
Low solubility
Oxygen
O2
Low solubility
Hydrogen
H2
insoluble
Helium
He
Insoluble
Nitrogen
N2
Insoluble