Why is it useful to study nitrogen and oxygen together in atmospheric composition?
Answer and explanation
Correct answer: Together they form most of dry air
Nitrogen and oxygen are the two dominant gases in dry air. Nitrogen makes up about 78% and oxygen about 21%, so together they account for roughly 99% of dry atmospheric air. This makes their combined study useful for understanding atmospheric composition. Option A is correct; they are gases, not water vapour or dust, and they do not disappear in the stratosphere.
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What is the correct answer to this question?
Together they form most of dry air
Why is this the correct answer?
Nitrogen and oxygen are the two dominant gases in dry air. Nitrogen makes up about 78% and oxygen about 21%, so together they account for roughly 99% of dry atmospheric air. This makes their combined study useful for understanding atmospheric composition. Option A is correct; they are gases, not water vapour or dust, and they do not disappear in the stratosphere.
Which subject and chapter does this question cover?
This is a Class 11 Accountancy question. Chapter: Theory Base of Accounting.
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