Which of the following describes how a catalyst increases the rate of a chemical reaction?
By increasing the average kinetic energy of the reactant particles.
By providing an alternative reaction pathway with a lower activation energy.
By increasing the total frequency of collisions between reactant particles.
By increasing the enthalpy change (ΔH\Delta HΔH) of the reaction.
31 exam-style questions on OCR GCSE Chemistry Controlling reactions. Each one has a worked solution and a mark scheme showing where the marks go.