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Question:

Which one of the following statements regarding Henry's law is not correct?

Different gases have different KH (Henry's law constant) values at the same temperature.

The partial pressure of the gas in vapour phase is proportional to the mole fraction of the gas in the solution.

The value of KH increases with the function of the nature of the gas.

Higher the value of KH at a given pressure, higher is the solubility of the gas in the liquids.

Solution:

Different gases have different KH values at the same temperature. This suggests that KH is a function of the nature of the gas. Therefore, statement (A) and (D) both are correct. Statement (C) is not correct because the value of KH does not simply increase with a general 'function of the nature of the gas'. While it is true that KH is dependent on the nature of the gas, it's a more complex relationship than a simple increase. The solubility of a gas is directly proportional to its partial pressure above the solution and the Henry's law constant for that gas. Statement (B) is a correct representation of Henry's Law.