Q.
The value of Henry's law constant for argon (Ar), carbon dioxide (CO2), methane (CH4) and formaldehyde (HCHO) are respectively 40.3K bar, 1.67K bar, 0.413K bar and 1.83×10−5K bar at 298K. The correct order of their solubility is
Higher the value of Henry's law constant, lower is the solubility of gas in water (or in liquid solvent).
The order of KH value is: 40.3Ar>1.67CO2>0.413CH4>1.83×10−5HCHO
Thus, the order of solubility is: Ar<CO2<CH4<HCHO