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Which is the correct sequence in orographic rainfall?

Answer and explanation

Correct answer: Moist air rises, cools, condenses and gives rain

Correct answer: A. Orographic rainfall occurs when moist air is forced to rise after meeting a mountain or highland. As the air rises, pressure decreases and the air expands and cools. Cooling reduces the air's capacity to hold water vapour. When saturation is reached, water vapour condenses into cloud droplets or ice crystals. Continued lifting can make these particles grow until precipitation falls, especially on the windward slope. Option A gives the correct cause-and-effect sequence: uplift, cooling, condensation and rain. Option B is wrong because descending air generally warms and becomes drier rather than condensing. Option C is wrong because drying does not create moisture. Option D is physically impossible because air does not become rock. Memory cue: mountain rainfall follows U-C-C-R—uplift, cooling, condensation, rain.

Related tags

Orographic RainfallMoist UpliftCondensationWindward SlopeClouds And PrecipitationWater In The AtmosphereGeographyClass 12 Mcq

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