Question

Why do naphthalene balls disappear without leaving any residue?

Answer 1

Answer:

it is done because of the prosses of sublimation wherein they directly get converted from solid to gaseous state leaving any residue

Answer 2

Naphthalene balls disappears after some time as its surface gains kinetic energy and directly gets converted into gas. The process of converting directly into gaseous form and not in a liquid state is termed as sublimation. Hence, when naphthalene is given fire, it gets converted into gas and disappears, without leaving any residue.