Every question from past board papers on Purification: crystallization, sublimation, distillation, differential extraction, newest paper first. Open any question for its full worked answer.
Match List I with List II
List I (Mixture): A. \(\mathrm{CHCl_3}\) + \(\mathrm{C_6H_5NH_2}\) B. Crude oil in petroleum industry C. Glycerol from spent-lye D. Aniline - water
List II (Method of Separation): I. Distillation under reduced pressure II. Steam distillation III. Fractional distillation IV. Simple distillation
Choose the correct answer from the options given below :
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
The most suitable method of separation of 1 : 1 mixture of ortho and para-nitrophenols is :
