A student uses an alkaline battery in a torch. After several hours the torch stops working. What has happened inside the battery?
The chemical reactions in the battery have been reversed
The two electrodes in the battery have become identical
All of the products of the reaction have been used up
One of the reactants in the battery has been used up
40 exam-style questions on AQA GCSE Chemistry 5.2 Chemical cells and fuel cells, covering 5.2.1 Cells and batteries, 5.2.2a Fuel cells, and 5.2.2b Half equations for hydrogen fuel cells. Each one has a worked solution and a mark scheme showing where the marks go.