GKFix MCQ Question

Which of the following reactions is a homogeneous equilibrium?

• A. Ca(OH)2(s) ⇌ Ca²⁺(aq) + 2OH⁻(aq)
• B. H2O(l) ⇌ H2O(g)
• C. CO(g) + H2O(g) ⇌ CO2(g) + H2(g)
• D. CaCO3(s) ⇌ CaO(s) + CO2(g)