The correct option is C The solubility of a gas is directly proportional to its pressure over the gas at constant temperature.
Henry's law is one of the gas laws formulated by William Henry in 1803 and states: "At a constant temperature, the amount of a given gas that dissolves in a given type and volume of liquid is directly proportional to the partial pressure of that gas in equilibrium with that liquid." An equivalent way of stating the law is that the solubility of a gas in a liquid is directly proportional to the partial pressure of the gas above the liquid:
where
P=KHC where
P is the partial pressure of the gas above the solution
KH is theHenry's Lawconstant for the solution
C is the concentration of the dissolved gas in solution
