Among the following gases which gas has the highest Henry's law constant, KH value in water at the same temperature?
According to Henry's law constant,' for a given external pressure of a gas, its solubility is inversely proportional to Henry's law constant,i.e, higher the value of KH, lower the solubility.
S∝1KH
Henry law constant for helium is highest and lowest for oxygen. The order is :
He>N2>H2>O2
Hence, option D is correct.