alleryWith increase in temperature, the solubility of most gases in water:
AIncreases
BFirst increases then decreases
CDecreases
DRemains constant
Answer & Solution
Correct answer: C. Decreases
Dissolution of a gas in water is exothermic (condensation of gas into liquid).
By Le Chatelier, raising T shifts the equilibrium back toward the gaseous phase — solubility decreases.
This is why hot industrial cooling water has low dissolved O₂.
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