question_answer

  Give an example each for the mixture having following characteristics. Suggest a suitable method to separate the components of these mixtures.                      (i) A volatile and non-volatile component. (ii) Two volatile components with appreciable difference in boiling points. (iii) Two immiscible liquids. (iv) One of the components changes directly from solid to gaseous state. (v) Two or more coloured constituents soluble  in some solvent.

Answer:

                  (i) Mixture of acetone and water-simple distillation.                                          (1/2+1/2) (ii) Mixture of kerosene and petrol-simple distillation.                                           (1/2+1/2) (iii) Mixture of mustard oil and water. Separating funnel (decantation)      (1/2+1/2) (iv) Mixture of ammonium chloride and common salt-sublimation.                 (1/2+1/2) (v) A mixture of different pigments from an extract of flower petals-chromatography.                      (1/2+1/2)