Why does raising the temperature increase the rate of a reaction?
The particles collide more often, and each collision has less energy
The particles collide less often, but each collision has more energy
The particles collide more often, and more collisions are energetic
The particles collide less often, and fewer collisions are energetic
41 exam-style questions on AQA GCSE Chemistry 6.1 Rate of reaction, covering 6.1.1a Calculating rates of reactions, 6.1.1b Gradient of a tangent as rate, 6.1.2 Factors which affect the rates of chemical reactions, 6.1.3 Collision theory and activation energy, and 6.1.4 Catalysts. Each one has a worked solution and a mark scheme showing where the marks go.