A council is deciding whether to collect and recycle plastic food trays.
Statement 1: The trays are made from several different polymers that must be sorted.
Statement 2: Recycling the trays reduces the amount of crude oil used to make new plastic.
Statement 3: The trays are dirty with food and must be washed before they can be recycled.
Which statements are reasons against recycling the trays?
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.