Chemistry · BGCSE / Air, water and the environment
StructuredPast exam questionForm 5 · BGCSE
Carbon dioxide, nitrogen and oxygen are all present in clean air.
- aState the proportion of oxygen in clean air. [1]
- bGive two uses of oxygen. [2]
- cName the process used to separate oxygen and nitrogen from air. [1]
You'll mark your own answer against the marking guide when you hand it in.
Source: BEC BGCSE Chemistry 2012, Paper 3, Question 4(e)
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