A scrap yard puts used copper water pipes into the same skip as old steel and aluminium items. The copper will be melted and made into new copper pipes.
Which change would improve the quality of the new copper pipes?
Collecting the pipes and the other items in separate skips.
Melting the pipes and the other items together into one metal.
Melting the pipes and the other items at a higher temperature.
Cutting the pipes and the other items into smaller pieces.
99 exam-style questions on AQA GCSE Chemistry 10.2 Life cycle assessment and recycling, covering 10.2.1 Life cycle assessment and 10.2.2 Ways of reducing the use of resources. Each one has a worked solution and a mark scheme showing where the marks go.