1 paper, 2022–2022 · Paper 1
The Chemistry IGCSE Paper 1 past papers in the collection that assess gases in the atmosphere.
By unit: all units (3) · Paper 1 (1) · Paper 2 (2)
These papers were matched to gases in the atmosphere automatically, by keyword patterns in their questions and mark schemes. A hand-check of 100 randomly chosen matches, each read against the source question paper and the specification's own statements for the topic, found 99 that genuinely assess the topic and 1 that does not — 99% (95% confidence interval 94.6–99.8%). That is a good way to find practice on a topic, not proof a paper covers it, and a paper missing from this list may still assess it. The topics are the specification’s headings, which are broad: one question on any statement under a heading was enough.
All Paper 1 papers | All Chemistry papers | How examiners mark each command word