Purification: crystallization, sublimation, distillation, differential extraction
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See all →- Match List I with List IIList I (Mixture): A. CHCl_3 + C_6H_5NH_2 B. Crude oil in petroleum industry C. Glycerol from spent-lye D. Aniline - waterList II (Method of Separation): I. Distillation under reduced pressure II. Steam distillation III. Fract… Answer: 1. A-IV, B-III, C-I, D-II CHCl₃ + aniline: boiling points well apart (334 K vs 457 K), simple distillation (IV). Crude oil: fraction... 1
- On heating, some solid substances change from solid to vapour state without passing through liquid state. The technique used for the purification of such solid substances based on the above principle is known as Answer: 3. Sublimation Key idea: sublimation is the conversion of solid directly into vapour. Solids like camphor, naphthalene and iodine ar... 1
- The most suitable method of separation of 1 : 1 mixture of ortho and para-nitrophenols is : Answer: 3. Steam distillation Key idea: o-nitrophenol is steam volatile, p-nitrophenol is not. o-Nitrophenol has intramolecular hydrogen bon... 1