GKFix MCQ Question

What is the correct expression for Qc for the reaction 2NO2(g) ⇌ N2O4(g)?

• A. Qc = [NO2]^2 / [N2O4]
• B. Qc = [N2O4] / [NO2]
• C. Qc = [NO2] / [N2O4]
• D. Qc = [N2O4] / [NO2]^2