Question

Henry's law states that?

• A. At a constant temperature gas dissolves in solution in proportion to its partial pressure
• B. At a constant pressure gas dissolves in solution in proportion to its temperature
• C. At a constant temperature gas dissolves in solution in proportion to its fat solubility
• D. At a constant pressure gas dissolves in solution in proportion to its fat solubility

Hint:

At fixed temperature, dissolved gas tracks its partial pressure.

Answer 1

The Correct Option is A

Step 1: Henry's law describes how much of a gas dissolves in a liquid. It states that at a constant temperature, the amount of a gas that dissolves in a given liquid is directly proportional to the partial pressure of that gas in equilibrium with the liquid.

Step 2: This can be written as \(C = k \times P\), where C is the concentration of dissolved gas, P is the partial pressure of the gas and k is the solubility constant for that gas and temperature. Higher partial pressure forces more gas into solution.

Step 3: Option a matches this exactly. The other options are wrong because solubility relates to partial pressure (not temperature directly) at constant temperature, and fat solubility is a separate property and not the defining variable in Henry's law. Hence the answer is option a.