Question

Some of the following gases are soluble in water due to formation of their ions

I. CO₂ II. NH₃

III. HCl IV. CH₄

V. H₂

Water insoluble gases can be

• A. I, IV, V
• B. I, V
• C. I, II, III
• D. IV, V

Answer 1

Answer: (D)

IV, V

Answer 2

CO₂ + H₂O $\rightleftharpoons$H⁺ + HCO₃^– $\rightleftharpoons$

2H⁺ + CO₃^2–

NH₃ + H₂O $\rightleftharpoons$NH₄⁺ + OH^– ;

HCl ¾® H⁺ + Cl^–