A company is comparing phytoextraction with quarrying and smelting as ways to obtain copper from a low-grade ore.
Statement 1: Phytoextraction produces copper more quickly than quarrying and smelting.
Statement 2: Phytoextraction does not need large quarries to be dug.
Statement 3: The ash from the burnt plants must be processed further to obtain copper.
Which statements are correct?
1 and 2 only
1 and 3 only
2 and 3 only
1, 2 and 3
61 exam-style questions on OCR GCSE Chemistry 6.1 Improving processes and products, covering 6.1.1 Extracting metals industrially and by electrolysis, 6.1.2 Life cycle assessment and recycling, 6.1.3 Biological methods of metal extraction, 6.1.4 The Haber process and the production of fertilisers, 6.1.5 Alloys and their uses, 6.1.6 Corrosion and its prevention, 6.1.7 Comparing and selecting materials, and 6.1.8 Industrial conditions, rate and position of equilibrium. Each one has a worked solution and a mark scheme showing where the marks go.