_________ is the change from the solid state into the gaseous state.

The correct answer is Sublimation.

Key Points

• ​Sublimation
  • It is the process used for those solids which convert directly into vapors on heating without converting into the liquid phase
  • Example: Naphthalene Balls

Additional Information

• Fusion
  • The process of melting (change of solid state into the liquid state) is called fusion. 
• Condensation
  • It is the process in which gas changes into the liquid state.
• Vapourization
  • The process in which a liquid substance changes into a gas rapidly on heating is known as vapourization.