In addition to our own exam-papers page, a useful site for students in CHEM courses is the LEARN “Chemistry Undergraduate” pages. These include past tests and exams (and for 100-level courses, answers too).
CHEM students should already be enrolled in the ‘course’ and see it when they log into LEARN. There is also a link to it “Past Tests (via LEARN)” on the Chemistry Subject Guide http://canterbury.libguides.com/chem