A student compares a hydrogen/oxygen fuel cell with a rechargeable battery.
Statement 1: The battery stores its reactants inside it, but the fuel cell is supplied with its reactants from outside.
Statement 2: The fuel cell must be recharged with electricity when its potential difference falls.
Statement 3: Both the fuel cell and the battery transfer energy from chemical reactions to an electric current.
Statement 4: The fuel cell gives out carbon dioxide and water.
Which statements are correct?
1, 3 and 4 only
1, 2 and 3 only
2 and 4 only
1 and 3 only
63 exam-style questions on OCR GCSE Chemistry 6.2 Organic chemistry, covering 6.2.1 Crude oil and fractional distillation, 6.2.2 Cracking and dependence on hydrocarbons, 6.2.3 Functional groups and homologous series, 6.2.4 Reactions of alkanes, alkenes and alcohols, 6.2.5 Addition polymerisation and repeat units, 6.2.6 Naturally occurring polymers, 6.2.7 Chemical cells and fuel cells, and 6.2.8 Condensation polymerisation and how to make one. Each one has a worked solution and a mark scheme showing where the marks go.