Catalysts are used in many industrial processes.
What is the main economic benefit of using a catalyst?
The catalyst makes the reaction produce a greater mass of product.
The catalyst means that no energy is needed to start the reaction.
The catalyst heats up the mixture, so no other heating is needed.
The reaction is fast enough at a lower temperature, so less energy is used.
122 exam-style questions on OCR GCSE Chemistry 5.2 Controlling reactions, covering 5.2.1 Measuring and interpreting rate of reaction, 5.2.2 Factors affecting rate and collision theory, and 5.2.3 Catalysts, activation energy and enzymes. Each one has a worked solution and a mark scheme showing where the marks go.