| List-I | List-II |
| (A) Coloured impurity | (P) Steam distillation |
| (B) Mixture of O-nitrophenol and p-nitrophenol | (Q) Fractical distillation |
| (C) Crude Naphtha | (R) Charcoal treatment |
| (D) Mixture of glycerol and sugars | (S) Distillation under reduced pressure. |
A) (A)-(R), (B)-(S), (C)-(P), (D)-(Q)
B) (A)-(R), (B)-(P), (C)-(S), (D)-(Q)
C) (A)-(P), (B)-(S), (C)-(R), (D)-(Q)
D) (A)-(R), (B)-(P), (C)-(Q), (D)-(S)
Correct Answer: D
Solution :
| (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. |
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