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If air has very high relative humidity why do clothes take longer to dry?

Answer and explanation

Correct answer: Air has low remaining capacity to take extra moisture

Direct answer: D. Relative humidity compares the water vapour actually present with the maximum amount the air can hold at that temperature. Very high relative humidity means the air is already close to saturation, so little capacity remains for accepting vapour from wet clothes. Evaporation therefore slows and drying takes longer. A is wrong because clothes do not normally produce heat merely because humidity is high; heat availability can instead affect evaporation. B is irrelevant to the movement of water from cloth into air. C is wrong because air pressure does not disappear when relative humidity is high. D is correct because low remaining capacity reduces the vapour-pressure difference that drives evaporation. Warm, moving, dry air usually dries clothes faster because it can accept more vapour and continually carries it away. Memory cue: high humidity means the air is nearly full, so wet clothes release water slowly.

Related tags

GeographyRelative HumidityEvaporationDryingHumidityAnd CondensationHumidity Evaporation And CondensationWater In The AtmosphereClass 12 Mcq

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