Nitrogen obtained from air is not absolutely pure because it contains the following except
-
oxygen
- carbon (IV)oxide
- inert gases
- water vapour
The correct answer is: A
Explanation
Nitrogen obtained from air is not absolutely pure because it contains other gases, including:
- Carbon dioxide: Makes up less than 0.04% of the atmosphere, but is important environmentally
- Argon: A component of air - one of the inert gases (0.93%)
- Water vapour.
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