alleryThe noble gases make up what share of dry air by volume?
AAbout 1 per cent
BAbout 5 per cent
CAbout 9 per cent
DAbout 15 per cent
Answer & Solution
Correct answer: A. About 1 per cent
1. Nitrogen and oxygen take almost all of the air.
2. The noble gases share what little is left.
3. Their abundance is about 1 per cent by volume.
_Source: syllabus Chemistry, Chapter 7, The p-Block Elements._
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