A catalyst alters the rate of a reaction, allowing it to be done at a lower temperature. Catalysts are therefore used in the chemical industry to make manufacturing processes more economical.

Hydrogen peroxide decomposes on its own into water and oxygen gas. This process is sped up by a catalyst. In this reaction, the catalyst is potassium permanganate, and the bubbles are full of oxygen ...

The questions in this quiz are suitable for GCSE combined science students studying the effect of concentration and pressure, surface area, temperature, and catalysts on the rate of reaction.