Vapours of sulphur escaping from a volcano often form a crust on the rocks. The process involved is an example of
condensation
precipitation
deposition
evaporation
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UPSC NDA-2 – 2022
Deposition is the phase transition in which gas transforms into solid without passing through the liquid phase. Sulphur escaping from a volcano as vapour (gas) cools upon contact with rocks and directly forms a solid crust. This is the reverse of sublimation.