The conversion of a solid directly into gas is called as :

Process of converting solid camphor into camphor vapour is called

Chlorination is a process used for water-purification. The disinfecting action of chlorine is mainly due to

Which one of the following processes is NOT useful for purification of solid impurities?

The technique of chromatography is used to –

A sample of any of the following substances disappears after sometime when exposed to air like camphor, naphthalene or dry ice. This phenomenon is called :