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Which type of air is more capable of taking more water vapour?

Answer and explanation

Correct answer: Warm and dry air

Direct answer: A, warm and dry air. The capacity of air to hold water vapour is mainly related to temperature. Warm air can contain more water vapour before becoming saturated than cold air can. The word “dry” means that this air already contains relatively little water vapour, so it has room to accept more moisture. Step by step: heating increases the maximum possible water-vapour content; dryness means the present content is low; therefore additional evaporation can take place more readily. B is wrong because cold saturated air is already holding as much vapour as it can at that temperature. C is wrong because very humid air has little remaining capacity, and it is also cold. D is wrong because air at the dew point is saturated, so further cooling usually causes condensation. Memory cue: warm air has greater capacity, while dry air has greater available capacity.

Related tags

GeographyAir HumidityWater VapourTemperatureHumidityEvaporationAnd CondensationHumidity Evaporation And CondensationWater In The AtmosphereClass 12 Mcq

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