Question

Sublimation is:

• A. Increasing the energy of a substance until the chemical reaction starts
• B. Process of change of state from gas to liquid
• C. Process of change of state from solid to gas
• D. Process of preparing water vapour even below the boiling point by subjecting it to extra pressure.

Answer 1

Answer: (C)

Process of change of state from solid to gas

Sublimation is the transition of a substance directly from the solid to the gas phase without passing through the intermediate liquid phase. Sublimation is an endothermic phase transition that occurs at temperatures and pressures below a substance's triple point in its phase diagram.