Some city buses are powered by hydrogen-oxygen fuel cells instead of diesel engines. The hydrogen is stored in tanks on the roof of the bus.
Complete the word equation for the overall reaction in the fuel cell: hydrogen + oxygen →\rightarrow→ ......
Give one reason why fuel cell buses are better for air quality in a city than diesel buses.
Give one hazard of storing hydrogen on a bus.
Give one disadvantage of using fuel cell buses, other than a hazard.
Most hydrogen is made from natural gas. This process releases carbon dioxide. Explain why this means that using a fuel cell bus still adds carbon dioxide to the atmosphere.
38 exam-style questions on Edexcel GCSE Chemistry 6.4 Chemical cells and fuel cells, covering 6.4.1 Chemical cells and fuel cells. Each one has a worked solution and a mark scheme showing where the marks go.