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What can warm air hold more than cold air?

Answer and explanation

Correct answer: Water vapour

Correct answer: D, water vapour. Water vapour is the gaseous form of water present in air. The capacity of air to hold water vapour generally increases as temperature rises. Warm air can therefore contain more moisture before it becomes saturated. When air cools, its capacity decreases; the excess vapour may then condense into droplets, producing dew, fog, clouds, or rain. A is incorrect because dust is made of solid particles, not the moisture-holding substance discussed here. B is incorrect because sound is a form of energy and is not stored according to air’s humidity capacity. C is incorrect because smoke consists of particles and gases from burning, not water vapour. D is correct because the question concerns atmospheric moisture. Memory cue: warm air has a larger ‘space’ for vapour; cooling can lead to condensation.

Related tags

GeographyHumidityTemperatureWater-VapourEvaporationAnd CondensationHumidity Evaporation And CondensationWater In The AtmosphereClass 12 Mcq

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