alleryMolecular nitrogen makes up what share of the atmosphere by volume?
A10 per cent
B78 per cent
C21 per cent
D48 per cent
Answer & Solution
Correct answer: B. 78 per cent
1. Nitrogen is the most abundant gas in the air.
2. Oxygen takes about a fifth of the total.
3. Nitrogen comprises 78 per cent by volume.
_Source: syllabus Chemistry, Chapter 7, The p-Block Elements._
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