Which process is gas to solid?

Which process is gas to solid?

• A. Condensation
• B. Freezing
• C. Deposition
• D. Sublimation

Answer: (C)

Gas to solid is deposition. In deposition, vapor molecules lose enough energy to become arranged directly into a solid structure, bypassing the liquid phase. This often happens at low temperatures and when vapor is saturated, causing it to deposit onto surfaces—like frost forming on a cold window. By contrast, condensation is gas turning into liquid, freezing is liquid turning into solid, and sublimation is solid turning into gas.

Gas to solid is deposition. In deposition, vapor molecules lose enough energy to become arranged directly into a solid structure, bypassing the liquid phase. This often happens at low temperatures and when vapor is saturated, causing it to deposit onto surfaces—like frost forming on a cold window. By contrast, condensation is gas turning into liquid, freezing is liquid turning into solid, and sublimation is solid turning into gas.