Question

give reason why naphthalene balls disappear without leaving any solid? please helps..

Answer 1

naphthalene balls goes through a process known as sublimation . in sublimation solid directly changes into gas and gas changes into solid

Answer 2

(a) Naphthalene balls undergo sublimation due to which it converts directly into vapours and disappear into air without leaving any solid.
(b) The particles of perfume diffuse rapidly into the air and its smell can be felt while sitting several metres away.