A hydrogen fuel cell supplies electricity to emergency lights in a theatre. Hydrogen and oxygen are fed into the cell. At its electrodes, hydrogen atoms, hydrogen ions and electrons are involved.
Which statement correctly describes the change at the hydrogen electrode?
Hydrogen ions lose electrons
Hydrogen ions gain electrons
Hydrogen atoms lose electrons
Hydrogen atoms gain electrons
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.