Glass bottles collected for recycling are sorted by colour. What is the reason for this?
Coloured glass has a much higher melting point than clear glass
Only clear glass can be crushed before it is melted down again
Mixed colours limit the products the glass can be made into
The colour changes the chemical formula of the glass produced
40 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.