Question 6
FA manufacturer compares two routes for obtaining the same mass of usable metal.
a.[3]
Use both pairs of bars to explain which route is favoured by the chart. Explain why the height of an energy bar cannot be compared directly with the height of a waste bar.
b.[3]
A supplier claims that the chart proves recycling has no environmental impact. Evaluate this claim and identify two further types of information needed for a fair life-cycle comparison.
c.[2]
The metal is iron. Explain why carbon can be used to extract iron from its oxide, but cannot be used to extract aluminium from aluminium oxide.
5.1 Obtaining and using metals Questions
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.