A remote wildlife recorder is being designed. It could be powered by either a hydrogen fuel cell or a rechargeable battery.
Which statement describes an advantage of using a hydrogen fuel cell rather than a rechargeable battery to power the recorder?
It keeps supplying electricity for as long as hydrogen and oxygen are fed in
It is lighter, because its hydrogen does not need to be stored in a strong tank
It forms no product, because all of the hydrogen is changed into electricity
It can be returned to use by connecting it to a mains electricity supply
90 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.