Identify the reaction which does not show a homogenous equilibrium.

• A. 2 SO_2(g) + O_2(g) ⇌ 2 SO_3(g)
• B. H_2(g) + Cl_2(g) ⇌ 2HCl_(g)
• C. NH_3(aq) + HCl_(aq) ⇌ NH₄⁺_(aq) + Cl^-_(aq)
• D. 2 KClO_3(s) ⇌ 2 KCl_(s) + 3 O_2(g)
• E. None of the above.

Answer: (D)