MDCAT Chemistry MCQ #2241

In a gaseous equilibrium like PCl5 ⇌ PCl3 + Cl2, reducing the volume of the container at constant temperature differs from adding an inert gas because:

MDCAT Chemistry MCQ #2241

  1. Question 1

    Q1. In a gaseous equilibrium like PCl5 ⇌ PCl3 + Cl2, reducing the volume of the container at constant temperature differs from adding an inert gas because:

    • A) The system shifts to the side with more moles
    • B) The concentration of all gaseous species initially increases
    • C) The value of the equilibrium constant Kc increases
    • D) The reaction rate of the forward reaction decreases

    Answer: The concentration of all gaseous species initially increases

    Explanation: Reducing volume increases the concentration of all species; the system shifts to the side with fewer moles to relieve the pressure.