question_answer

  What types of mixtures are separated by the technique of crystallization?

Answer:

  Crystallization method can be used to purify those mixtures which (i) contain insoluble and/or soluble impurities.                                                                                                                   (1) (ii) are crystalline in nature.                                                                                                                                                         (1) (iii) either decompose or get charred (e.g., sugar) on heating to dryness, i.e., which cannot be separated by evaporation.                                                                                                                                                                                      (1) (iv) cannot be separated by filtration as some impurities are soluble.                                                                      (1)