Question

what is sublimation and condensation

Answer 1

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SUBLIMATION is the change in state of substance from solid directly to gas without passing through the liquid phase.
CONDENSATION is the process by which water vapour in the air is changed into liquid water.
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Answer 2

Sublimation is the process in which a substance of solid state directly changes into the gaseous state without changing into the liquid and on cooling the substance of gaseous state is directly changes to solid.

Condensation is the process of change of state of the substance from its gaseous state to liquid state at a particular temperature.

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