MP Board · Class 9 · Science · Matter in Our SurroundingsWhy do naphthalene balls disappear with time without leaving any solid residue behind?

Naphthalene is a sublime substance that undergoes sublimation at room temperature. It directly changes from the solid state to the gaseous state without passing through the liquid phase. As it continuously turns into vapor and diffuses into the surrounding air over time, naphthalene balls gradually shrink and disappear completely without leaving any solid residue.