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In which condition will evaporation be very slow even if surface water is available?

Answer and explanation

Correct answer: Low temperature, high humidity, and calm air

Correct answer: A. Evaporation becomes faster when water receives more heat, when the air is dry, and when wind removes moist air from above the surface. Option A combines the opposite conditions: low temperature supplies little energy, high humidity means the air is already holding much water vapour, and calm air allows moist air to remain near the surface. These conditions reduce the vapour-pressure difference and therefore slow the escape of water molecules. B, C, and D all contain conditions that generally support evaporation: warmth, dryness, wind, an open surface, or strong solar heating. They may not guarantee a particular rate in every situation, but they are not the best answer for very slow evaporation. Memory cue: “Cold, crowded, calm air slows evaporation.”

Related tags

EvaporationHumidityWindAnd CondensationHumidity Evaporation And CondensationWater In The AtmosphereGeographyClass 12 Mcq

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