Question

___ is the process in which a solid directly changes to gas, without turning into liquid.

Answer 1

Sublimation:
The process where a solid is directly converted to gas without the formation of liquid is called sublimation. In this type of conversion, the change of state occurs directly from solid to gas.
Examples: naphthalene is one common example of an organic compound that undergoes sublimation in the presence of air.

Final Answer: Sublimation is the process in which a solid directly changes to gas, without turning into liquid.