What happens to the water vapour holding capacity of air when it cools?
Answer and explanation
Correct answer: It decreases
When air cools, its saturation water-vapour holding capacity decreases. Thus, cooling air can reach saturation more easily, and further cooling may lead to condensation. ‘It remains unchanged’ is incorrect because this capacity varies with temperature. Exam tip: lower temperature means lower water-vapour capacity.
Frequently asked questions
What is the correct answer to this question?
It decreases
Why is this the correct answer?
When air cools, its saturation water-vapour holding capacity decreases. Thus, cooling air can reach saturation more easily, and further cooling may lead to condensation. ‘It remains unchanged’ is incorrect because this capacity varies with temperature. Exam tip: lower temperature means lower water-vapour capacity.
Which subject and chapter does this question cover?
This is a Class 12 Geography question. Chapter: Water in the Atmosphere. Topic: Humidity, evaporation, and condensation.
