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Explain how nitrobenzene and benzene arc separated and purified. (or) How will you separate the mixture of diethyl ether and ethanol?

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  • The process of distillation involves the impure liquid when boiled gives out vapour and the vapour so formed is collected and condensed to give back the pure liquid in the receiver.
  • This method is to purify liquids from nonvolatile impurities and used for separating the constituents of a liquid mixture which differ in their boiling points.
  • In this simple distillation process, liquids with large difference in boiling point (about 40K) and do not decompose under ordinary pressure can be purified.
  • e.g., the mixture of C6H5NO2 nitrobenzene (h.p. 484 K) and C6H6 benzene (b.p. 354 K) can be urified and separated. Similarly the mixture of diethyL ether (b.p. 308K) and ethyl alcohol (h.p. 351 K) can he purified and separated.

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