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Formation of fog in winter is related to which process?

Answer and explanation

Correct answer: Condensation

Fog forms when moist air close to the ground cools sufficiently for water vapour to change into extremely small liquid-water droplets suspended in the air. This gas-to-liquid change is called condensation, so option C is correct. During winter, cooling may reduce the amount of water vapour that air can hold. When the air reaches its dew point, excess vapour condenses around tiny particles and becomes visible as fog. Melting is a solid-to-liquid change, freezing is a liquid-to-solid change, and sublimation is a solid-to-gas change. None of those transformations describes the usual formation of fog. The droplets remain suspended, which explains why fog looks like a cloud near the ground.

Related tags

FogCondensationChange-Of-StateNature Of MatterSome Basic Concepts Of ChemistryChemistryClass 11 Mcq

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