Final answer:
The false statement is that the solubility of a gas increases in direct proportion to its partial pressure above the solution.
Step-by-step explanation:
The false statement among the options is A) The solubility of a gas increases in direct proportion to its partial pressure above the solution. This statement is false because the solubility of a gas increases with increasing pressure, but not in direct proportion to it. Instead, the relationship between solubility and pressure is described by Henry's law, which states that the solubility of a gas is directly proportional to its partial pressure.