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What is the importance of condensation nuclei in cloud formation?

Answer and explanation

Correct answer: They provide surfaces for vapour to attach and form droplets

Correct answer: A. Condensation nuclei are very small particles suspended in the air, such as suitable dust, salt or smoke particles. When moist air cools and approaches saturation, water vapour can attach to these particles and begin forming tiny water droplets. A large collection of such droplets can contribute to cloud formation. The nuclei do not create water from nothing; they provide surfaces that make condensation easier under suitable atmospheric conditions. B is wrong because nuclei do not completely block sunlight, although clouds may reduce incoming light. C is wrong because they do not directly turn all air into water; they assist vapour in becoming droplets. D is wrong because nuclei do not always prevent rainfall; cloud droplets may grow and eventually produce precipitation. Memory cue: nuclei are the tiny ‘starting surfaces’ for cloud droplets.

Related tags

GeographyCondensation NucleiCloud FormationForms Of Condensation: DewFrostFogAnd MistForms Of Condensation Dew Frost Fog And MistWater In The AtmosphereClass 12 Mcq

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