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If air is saturated, what may happen when more water vapour is added?

Answer and explanation

Correct answer: Extra vapour may condense

Correct answer: A, extra vapour may condense. Saturated air contains approximately the maximum water vapour it can hold at its current temperature. If more vapour is supplied, the air cannot keep all of it in gaseous form under the same conditions. The excess may change into tiny liquid droplets or ice crystals; this change from vapour to liquid or solid water is condensation. Such condensation can contribute to dew, fog, clouds, or precipitation, depending on the conditions. B is wrong because adding moisture does not make saturated air dry. C is wrong because saturation does not mean temperature must become zero; saturation can occur at many temperatures. D is wrong because condensation does not turn water into rock, and evaporation is not described that way. The word “may” is important because the exact visible result depends on temperature and other atmospheric conditions. Memory cue: saturated air is “full”; extra moisture must come out by condensation.

Related tags

GeographySaturationCondensationWater VapourHumidityEvaporationAnd CondensationHumidity Evaporation And CondensationWater In The AtmosphereClass 12 Mcq

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