Equal masses of zinc powder and iron powder are added to separate samples of excess dilute hydrochloric acid of the same concentration and temperature. Which statement is correct?
Zinc gives off hydrogen faster because zinc is more reactive than iron.
Iron gives off hydrogen faster because iron is more reactive than zinc.
Zinc gives off hydrogen faster because zinc has a lower melting point.
Both metals give off hydrogen at the same rate in the same acid.
86 exam-style questions on AQA GCSE Chemistry 4.1 Reactivity of metals, covering 4.1.1 Metal oxides, 4.1.2 The reactivity series, 4.1.3 Extraction of metals and reduction, and 4.1.4 Oxidation and reduction in terms of electrons. Each one has a worked solution and a mark scheme showing where the marks go.