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If relative humidity is very high then how is the rate of evaporation generally?

Answer and explanation

Correct answer: Low

Correct answer: B, low. Evaporation is the change of liquid water into water vapour. It occurs more readily when the surrounding air can accept more water vapour. Relative humidity tells us how close the air is to being saturated with moisture. When relative humidity is very high, the air already contains a large amount of water vapour, so the difference between the vapour at the wet surface and the vapour in the air is small. Consequently, fewer water molecules leave the liquid surface each second, and evaporation generally becomes slow. A is wrong because very humid air does not encourage rapid drying. B is correct because nearly saturated air accepts additional vapour slowly. C is wrong because evaporation cannot become infinite. D is wrong because a rate is not expressed as a temperature below zero. Memory cue: humid air means slow drying; dry air means faster evaporation.

Related tags

GeographyRelative-HumidityEvaporationWater-In-AtmosphereHumidityAnd CondensationHumidity Evaporation And CondensationWater In The AtmosphereClass 12 Mcq

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