Q. Which statement best describes Le Chatelier's principle?
✅ Correct Answer: (A)
A system at equilibrium will shift to counteract any imposed change in conditions.
Explanation: Le Chatelier's principle states that an equilibrium system responds to disturbances (changes in concentration, pressure, temperature) by shifting to oppose the change. Option 2 is false because the equilibrium constant K remains the same for a given temperature; only changing temperature changes K. Option 3 is generally false for constant volume — adding an inert gas at constant volume does not change partial pressures of reactants/products, so equilibrium doesn't shift. Option 4 is false because temperature changes do affect equilibrium constants and positions.
Explanation by: Sikhar Chaudhary
Le Chatelier's principle states that an equilibrium system responds to disturbances (changes in concentration, pressure, temperature) by shifting to oppose the change. Option 2 is false because the equilibrium constant K remains the same for a given temperature; only changing temperature changes K. Option 3 is generally false for constant volume — adding an inert gas at constant volume does not change partial pressures of reactants/products, so equilibrium doesn't shift. Option 4 is false because temperature changes do affect equilibrium constants and positions.