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SAI International School
                                                      Class – VII

                                               Subject – Chemistry
                                   Topic –Matter and Chemical Formulae
                       Sub-Topic – Difference between Compound and Mixture





                                                  LESSON NOTES

         Difference  between mixture and  a compound


          Sl. No                MIXTURE                                           COMPOUND

          1.Composition         Constituents of mixtures           Constituents  of  compounds  have
                                Have no definite proportion.   definite proportion.
                                Explanation:  In  mixture  of  Explanation:  In  compound  of  iron
                                iron  fillings  and  sulphur  sulphide iron and Sulphur  have fixed
                                powder  is  independent  of  proportion by weight.
                                volume of its constituents.
          2. Properties         Constituents  of  mixtures  Properties                of        Constituents
                                retains       its     individual  of     compounds         completely      get
                                properties.                        changed.
                                In  mixture  of  iron  fillings  Iron  sulphide  is  black  in  colour  and
                                and sulphur powder retains  does  not  get  attracted  towards
                                the    properties     of    both  magnet.
                                Sulphur  and  iron  so  no
                                change  of  colour  takes
                                place.

          3.Separation          No     new     substance       is  New substance is formed.
                                formed.                            In  compound  of  iron  sulphide,  the
                                In  mixture  of  iron  fillings  chemical  combination  of  iron  and
                                and sulphur powder no new  Sulphur takes place. which cannot be
                                substance is produced. It is  separated by any physical mean
                                a  physical  mixture  and  can
                                be  easily  separated  by
                                using magnet.















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