The presence of light gases in the exosphere is most related to which fact?
Answer and explanation
Correct answer: Gases in the upper atmosphere are very rarefied and light
The governing concept is decreasing atmospheric density with increasing altitude. In the exosphere, particles are extremely far apart, and the lightest gases, especially hydrogen and helium, are more able to remain at great heights or escape Earth’s gravitational pull. Heavy rain, abundant water vapour and active weather require denser lower air, so B, C and D are unsuitable. Therefore, option A is correct.
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What is the correct answer to this question?
Gases in the upper atmosphere are very rarefied and light
Why is this the correct answer?
The governing concept is decreasing atmospheric density with increasing altitude. In the exosphere, particles are extremely far apart, and the lightest gases, especially hydrogen and helium, are more able to remain at great heights or escape Earth’s gravitational pull. Heavy rain, abundant water vapour and active weather require denser lower air, so B, C and D are unsuitable. Therefore, option A is correct.
Which subject and chapter does this question cover?
This is a Class 11 Accountancy question. Chapter: Theory Base of Accounting.
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