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Increasing the pressure of a gas above a liquid, at constant temperature, affects the solubility of that gas in the liquid in which way?
AThe solubility decreases
BThe solubility increases
CThe solubility stays the same
DThe gas stops reacting entirely
Answer & Solution
Correct answer: B. The solubility increases
1. Pressure changes affect solubility only for a gas dissolving in a liquid.
2. According to the text, when pressure is increased the solubility of a gas in a liquid increases.
3. This is the principle behind carbonated drinks, which are bottled under high CO2 pressure.
4. Therefore raising the pressure increases the solubility.
_Source: Samacheer Kalvi (TN SCERT) Class 10 Science, Unit 9 Solutions "Effect of Pressure", p.135_
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