Question

Explain why naphathaline balls kept in cupboard disappears over a period of time

Answer 1

Due to Sublimation. Naphthalene balls when kept in cupboards over a period of time sublime into their gaseous state and evaporate into thin air.

Answer 2

Hey friend
usually naphathaline balls undergo sublimation process i.e transfer of substance from solid to gas .so naphathaline balls kept in cupboard disappears..