Question: What is the effect of adding an inert gas to a reaction at equilibrium at constant volume?

Options:

1. Shifts the equilibrium to the right
2. Shifts the equilibrium to the left
3. No effect
4. Increases the reaction rate

Correct Answer: No effect

Solution:

Adding an inert gas at constant volume does not change the partial pressures of the reactants or products, thus having no effect on the equilibrium position.