Which of the following process and its material pair is NOT correctly matched?

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

Which of the following process/ processes release heat? (i) Condensation (ii) Vaporisation (iii) Freezing (iv) Melting Correct option is :

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?

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