A student writes three statements about how metals resist oxidation.
Statement 1: gold is found uncombined in the Earth because it has a very low tendency to form positive ions
Statement 2: in the same conditions, iron objects corrode faster than copper objects because iron is higher in the reactivity series
Statement 3: aluminium is higher than iron in the reactivity series, so aluminium window frames corrode faster than iron ones
Which statements are correct?
1 only
2 and 3 only
1, 2 and 3
1 and 2 only
45 exam-style questions on Edexcel GCSE Chemistry 5.1 Obtaining and using metals, covering 5.1.1 The reactivity series of metals, 5.1.2 Displacement reactions as redox reactions, 5.1.3 Extracting metals from ores by reduction, 5.1.4 Biological methods of metal extraction, 5.1.5 Resistance to oxidation and recycling metals, and 5.1.6 Life cycle assessment. Each one has a worked solution and a mark scheme showing where the marks go.