Question

give reasons for the following observations :naphthalene balls disappear with time without leaving any solid​

Answer 1

Answer: because of sublimation.

Explanation: change of phase from solid to gas is called sublimation.

Answer 2

This happens as napthalene balls sublime

Sublimation is a process; n which the solid directly changes into gaseous state without underoing liquid state

I hope this helps ( ╹▽╹ )