JEE Main Chemistry Class 12 Analytical Chemistry Questions

(A) Charcoal treatment removes coloured impurity through adsorption.
(B) Steam distillation separates the mixture of o nitrophenol and p -nitrophenol. The o -nitrophenol is steam volatile (due to intramolecular hydrogen bonding), and the para isomer is not volatile.
(C) Fractional distillation separates crude naphtha. Naphtha is a flammable liquid hydrocarbon mixture.
(D) Distillation under reduced pressure separates mixture of glycerol and sugars. Vacuum distillation lowers the boiling point and prevents decomposition.