Question

what is meant by sublimation reaction​

Answer 1

In sublimation reaction a object in solid state directly converts to gaseous state without changing into liquid state.

Answer 2

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 process that occurs at temperatures and pressures below a substance's triple point in its phase diagram, which corresponds to the lowest pressure at which the substance can exist as a liquid.