Which one of the following processes is used to separate a sublimable solid (like camphor or naphthalene) from its non-sublimable impurities?

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

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 :

Which one of the following methods can be used to separate anthracene from a mixture of salt and anthracene ?

Which one of the following apparatus is used for separating benzene and water mixture ?

Which among the following methods is used to separate the constituents present in a compound?