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What is the role of condensation nuclei?

Answer and explanation

Correct answer: They provide a base for water droplets

Correct answer: C. Condensation nuclei are extremely small particles suspended in the atmosphere, such as suitable dust, smoke, salt, or other aerosols. Water vapour can condense more readily on these particles when air cools to the required condition. The particles provide a surface on which tiny water droplets or ice crystals begin to form. Large groups of these droplets or crystals can contribute to cloud formation. A is impossible because atmospheric nuclei do not cool the Sun. B is unrelated; they do not stop oceans or seas. D is also incorrect because nuclei remain within the air and do not remove it. The important idea is that water vapour changes into visible droplets more easily around tiny particles. A memory cue is: nuclei are ‘starting points’ for cloud droplets, not the clouds themselves.

Related tags

GeographyCondensation-NucleiCloud-FormationHumidityEvaporationAnd CondensationHumidity Evaporation And CondensationWater In The AtmosphereClass 12 Mcq

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