Why does the amount of water vapour remain low in polar regions?
Answer and explanation
Correct answer: Because low temperature reduces evaporation and the moisture-holding capacity of air
The governing concept is the temperature dependence of evaporation and saturation vapour capacity. Very cold polar surfaces provide little energy for evaporation, and cold air reaches saturation with much less water vapour than warm air. Any vapour present may also condense or freeze and be removed from the air. Therefore A is correct. Gravity and nitrogen are present at the poles, and option D has no scientific meaning.
Frequently asked questions
What is the correct answer to this question?
Because low temperature reduces evaporation and the moisture-holding capacity of air
Why is this the correct answer?
The governing concept is the temperature dependence of evaporation and saturation vapour capacity. Very cold polar surfaces provide little energy for evaporation, and cold air reaches saturation with much less water vapour than warm air. Any vapour present may also condense or freeze and be removed from the air. Therefore A is correct. Gravity and nitrogen are present at the poles, and option D has no scientific meaning.
Which subject and chapter does this question cover?
This is a Class 11 Accountancy question. Chapter: Theory Base of Accounting.
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