MHT CET202613 April 2026Morning ShiftChemistrySolutionsActual
Identify a pair of gases from following that does not obey Henry's law.
Options
- ANH ₃ and CO ₂
- BCO ₂ and O ₂
- CNH ₃ and N ₂
- DN ₂ and CH ₄
Correct answer
A. NH ₃ and CO ₂
Step-by-step solution
Henry's law is applicable only to those gases which do not react chemically with the solvent and do not undergo dissociation or association in the solution. Gases like NH ₃ and CO ₂ react with water to form NH ₄ OH and H ₂ CO ₃ respectively. NH ₃ + H ₂ O NH ₄^+ + OH ^- CO ₂ + H ₂ O H ₂ CO ₃ H ^+ + HCO ₃^- Due to their chemical reaction with the solvent, their solubility is exceptionally high and they do not obey Henry's law. Gases like O ₂ , N ₂ , and CH ₄ do not react with water and thus obey Henry's law. Answer: