The process of change of solid state directly into gaseous state is termed as which of the following?

Sublimation

The correct answer is option 3. Sublimation.

The process of change of a solid state directly into a gaseous state is termed Sublimation.

Sublimation describes the transition of a substance from a solid phase directly into a gas phase, bypassing the liquid state altogether. This is commonly observed with materials like dry ice (solid \(CO_2\)) or mothballs (paradichlorobenzene).

Solidification: This refers to the opposite process, where a liquid transforms into a solid state. Deposition: Similar to sublimation, deposition describes the direct change of a gas into a solid state without going through the liquid phase.

Condensation: This is the process where vapor molecules in the air transition back into a liquid state.