alleryHenry law states that the partial pressure of a gas in solution is
AProportional to its mole fraction
BIndependent of its mole fraction
CInversely proportional to its mole fraction
DEqual to atmospheric pressure
Answer & Solution
Correct answer: A. Proportional to its mole fraction
1. Henry law addresses the solubility of a gas in a liquid at a given temperature.
2. It states p = K_H × x, where p is partial pressure of the gas above the solution.
3. So the partial pressure is directly proportional to the mole fraction of dissolved gas.
4. K_H, Henry constant, depends on gas and temperature (increases with temperature for most gases).
_Source: syllabus Chemistry, Unit 1 "Solutions", §1.4_
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