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Which is a wrong understanding of the role of dust particles in cloud formation?

Answer and explanation

Correct answer: They always destroy water vapour

Correct answer: D. Tiny particles such as suitable dust, salt, or smoke can act as condensation nuclei. Water vapour can attach to these microscopic surfaces, and under suitable cooling and humidity conditions, the attached water can grow into cloud droplets. Thus A, B, and C describe helpful or scientifically reasonable roles: particles provide surfaces and support condensation. D is the wrong understanding because dust does not always destroy water vapour. Its role is not automatically harmful; it can help water vapour change into liquid droplets. The word “always” is an important warning in the option. Dust may affect cloud properties in different ways depending on its composition, size, and atmospheric conditions, but it is not correct to say that it always destroys vapour. Memory cue: condensation nuclei are “seeds” for droplets, not enemies that remove all vapour.

Related tags

Dust ParticlesCondensation NucleiCloud FormationHumidityEvaporationAnd CondensationHumidity Evaporation And CondensationWater In The AtmosphereGeographyClass 12 Mcq

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