Which statement correctly describes the effect of adding a catalyst to a chemical system at equilibrium, at a constant temperature?
It increases the equilibrium yield of the products.
It provides an alternative pathway with a lower activation energy for both the forward and reverse reactions.
It increases the rate of the forward reaction but has no effect on the rate of the reverse reaction.
It alters the overall enthalpy change (ΔH\Delta HΔH) of the reaction.
16 exam-style questions on AQA A Level Chemistry Kinetics, covering Collision theory, Maxwell–Boltzmann distribution, Effect of temperature on reaction rate, Effect of concentration and pressure, and Catalysts. Each one has a worked solution and a mark scheme showing where the marks go.