Question

after winters people pack of their woollens by keeping naphthalene balls in them with passage of time these balls becomes small in size why do this happened what type of change is involved during this process

Answer 1

Naphthalene balls are sublimate solid
It goes under the process of sublimation .in the presence of atmosphere
Sublimate solids are those solid which turns from solid to gas in presence of atmosphere around them
This process of conversion of solid into gas is called sublimation