question_answer

  Suggest separation techniques one would need to employ to separate the following mixtures. (i) Mercury and water. (ii) Potassium chloride and ammonium chloride. (iii) Common salt, water and sand. (iv) kerosene oil, water and salt.

Answer:

                  (i) Decantation with the help of a separating runnel.                                                            (1/2) (ii) Sublimation                                            (1/2) (iii) Decantation   (or  Filtration)   followed  by crystallisation.                                             (1/2) (iv) Separating funnel is used to separate kerosene oil. Then crystallisation of the mixture to separate water and salt.                                            (1/2)