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What happens to extra water vapour when saturated air cools further?

Answer and explanation

Correct answer: It may condense

Direct answer: C. Saturated air already contains approximately the maximum water vapour it can hold at its current temperature. When it cools further, that capacity decreases. The extra vapour cannot remain entirely in the gaseous state, so it may change into liquid droplets through condensation or, under sufficiently cold conditions, into ice particles. A is wrong because water vapour does not chemically turn into nitrogen merely by cooling. B is wrong because the water is not destroyed; it changes phase and remains as droplets or ice. C is correct because it describes the normal response to excess vapour after cooling. D is wrong because condensation does not make atmospheric pressure zero. This process can produce dew, fog, clouds or precipitation depending on where the droplets form and how they grow. Memory cue: saturated air cooled further has less capacity, so surplus vapour condenses.

Related tags

GeographySaturated AirCondensationDew PointHumidityEvaporationAnd CondensationHumidity Evaporation And CondensationWater In The AtmosphereClass 12 Mcq

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