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What is the contribution of condensation nuclei in cloud formation?

Answer and explanation

Correct answer: They give vapour a surface to form droplets

Correct answer: A. Condensation nuclei are extremely small particles suspended in the atmosphere, such as suitable dust, salt, smoke, or other aerosol particles. When moist air cools toward saturation, water vapour can condense more readily on these particles. The particle provides a surface around which a tiny liquid droplet or, under suitable conditions, an ice particle can begin to form. Option A is correct because it states this supporting role. Option B is wrong because nuclei do not always stop rain; they can help cloud droplets form. Option C is wrong because they do not turn air into rock. Option D is wrong because they do not burn droplets. Memory cue: a condensation nucleus is a tiny “starting surface” for atmospheric water.

Related tags

Condensation NucleiCloud FormationWater DropletsClouds And PrecipitationWater In The AtmosphereGeographyClass 12 Mcq

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