Question

give reason for, Naphthalen balls disappear with tissue without leaving any solid

Answer 1

Napthalene undergo sublimation where it directly changes to gaseous state without passing through the intervening liquid state. So it disappear

Answer 2

Answer:

Naphthalene undergoes sublimation easily i.e., the change of state of naphthalene from solid to gas without the intervention of the liquid state. Thus, naphthalene balls keep on forming naphthalene vapours which disappear into the air with time without leaving any solid.