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Which of the following factors can slow evaporation?

Answer and explanation

Correct answer: High humidity

Direct answer: B is correct. Evaporation is easier when the air above a water surface can accept more water vapour. High-humidity air already contains a large amount of moisture, so the difference between the wet surface and the air is smaller. Fewer water molecules leave the surface, and evaporation slows. A is wrong because strong wind removes moist air and brings drier air, usually increasing evaporation. C is wrong because higher temperature gives surface molecules more energy and generally increases evaporation. D is wrong because an open or larger exposed surface allows more water to contact the air and generally speeds the process. B is correct, but humidity is not the only control: temperature, wind, exposed area, and dryness also matter. Memory cue: moist air is already “full,” so it accepts less new vapour.

Related tags

GeographyEvaporationHumidityWindAnd CondensationHumidity Evaporation And CondensationWater In The AtmosphereClass 12 Mcq

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