alleryWhich gas does **not** obey Henry's law in water, because it reacts chemically with the solvent?
AHe
BO₂
CNH₃
DN₂
Answer & Solution
Correct answer: C. NH₃
NH₃ reacts with water: NH₃ + H₂O ⇌ NH₄⁺ + OH⁻, so its observed solubility is much higher than $K_H P$.
CO₂ behaves similarly (CO₂ + H₂O ⇌ H₂CO₃).
N₂, O₂, He are essentially inert and obey Henry's law.
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