(A)−(R),(B)−(P),(C)−(Q),(D)−(S)
Coloured impurity → Charcoal treatment
mixture of o – nitrophenol and p –nitrophenol→Steam distillation(Both form intermolecular H-Bond)
Crude Naphtha→Fractional distillation
mixture of glycerol and sugars → Distillation under reduced pressure