Manganese(IV) oxide, iron and nickel are all used as catalysts in industry. What does a catalyst do in a chemical reaction?
It increases the rate of the reaction and is used up
It increases the rate of the reaction and is not used up
It decreases the rate of the reaction and is used up
It decreases the rate of the reaction and is not used up
40 exam-style questions on AQA GCSE Chemistry 1.3 Properties of transition metals, covering 1.3.1 Comparison with Group 1 elements and 1.3.2 Typical properties of transition metals. Each one has a worked solution and a mark scheme showing where the marks go.