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In which condition will frost not form?

Answer and explanation

Correct answer: The surface is very warm

Correct answer: C, the surface is very warm. Frost is a deposit of ice crystals that forms when a surface becomes sufficiently cold, usually at or below the freezing point, and water vapour changes directly into ice on that surface. Moist air supplies the water vapour, while a cold night helps the surface lose heat. A is not correct because a surface below freezing provides the cold condition needed for frost. B is not correct because moisture is the source of the deposited ice. D is not correct because a cold night usually favours strong cooling of exposed surfaces. C is correct because a very warm surface does not provide the low temperature required for vapour to deposit as ice. Memory cue: frost means “frozen deposit”; without a cold surface, it cannot form.

Related tags

FrostFreezing SurfaceCondensationForms Of Condensation: DewFogAnd MistForms Of Condensation Dew Frost Fog And MistWater In The AtmosphereGeographyClass 12 Mcq

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