Henry law states that the partial pressure of a gas in solution is
A{'text': 'Proportional to its mole fraction', 'label': 'A'}
B{'text': 'Independent of its mole fraction', 'label': 'B'}
C{'text': 'Inversely proportional to its mole fraction', 'label': 'C'}
D{'text': 'Equal to atmospheric pressure', 'label': 'D'}
Answer & Solution
Correct answer: A. {'text': 'Proportional to its mole fraction', 'label': 'A'}
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: NCERT Class 12 Chemistry, Unit 1 "Solutions", §1.4_
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