GKFix MCQ Question

Which of the following reactions will not be affected by a change in pressure?

• A. PCl₅(g) ⇌ PCl₃(g) + Cl₂(g)
• B. CaO(s) + CO₂(g) ⇌ CaCO₃(s)
• C. 3Fe(s) + 4H₂O(g) ⇌ Fe₃O₄(s) + 4H₂(g)
• D. CO₂(g) + C(s) ⇌ 2CO(g)