AQA
1. http://papers.xtremepapers.com/AQA/Chemistry/
2. http://www.aqa.org.uk/exams-administration/exams-guidance/find-past-papers-and-mark-schemes (Chemistry > A-level > Chemistry (2420)
Edexcel
http://papers.xtremepapers.com/Edexcel/Advanced%20Level/Chemistry/
