GKFix MCQ Question

What is the correct expression for Qc for the reaction PCl5(g) ⇌ PCl3(g) + Cl2(g)?

• A. Qc = [PCl5] / ([PCl3][Cl2])
• B. Qc = [PCl3] / ([PCl5][Cl2])
• C. Qc = [Cl2] / ([PCl3][PCl5])
• D. Qc = [PCl3][Cl2] / [PCl5]