What may happen when warm moist air meets a cold surface?
Answer and explanation
Correct answer: Water vapour may condense into water droplets
When warm moist air touches a cold surface, the air cools. If it cools to its dew point, the water vapour in it condenses into tiny water droplets, as seen on the outside of a cold glass. Option B is incorrect because air can hold more moisture when it becomes warmer, whereas the air here is cooling. Exam tip: cooling to the dew point leads to condensation.
Frequently asked questions
What is the correct answer to this question?
Water vapour may condense into water droplets
Why is this the correct answer?
When warm moist air touches a cold surface, the air cools. If it cools to its dew point, the water vapour in it condenses into tiny water droplets, as seen on the outside of a cold glass. Option B is incorrect because air can hold more moisture when it becomes warmer, whereas the air here is cooling. Exam tip: cooling to the dew point leads to condensation.
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.
