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What can contribute to dense fog in an urban area?

Answer and explanation

Correct answer: Dust and smoke can provide condensation nuclei

A is correct. Fog forms when moist air near the ground cools to saturation and water droplets form. Dust and smoke particles can act as condensation nuclei on which droplets develop. They may help fog form, but moisture and suitable cooling are also needed.

Related tags

Urban FogCondensation NucleiHumidityEvaporationAnd CondensationHumidity Evaporation And CondensationWater In The AtmosphereGeographyClass 12 Mcq

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