Which of the following gas-liquid pairs is least likely to obey Henry's law directly because chemical reaction with the solvent can interfere?
A$\mathrm{N_2}$ in water
B$\mathrm{O_2}$ in water
C$\mathrm{NH_3}$ in water
DA noble gas in water
Answer & Solution
Correct answer: C. $\mathrm{NH_3}$ in water
Henry's law applies directly when the gas does not react with the liquid. Ammonia dissolves in water with strong interaction and chemical reaction to form ammonium hydroxide-related species, so it shows strong deviation from the simple law.
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