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SAI International School
                                                       Class-X

                                               Subject_ Chemistry
                                 Topic-Chemical Reactions and Equations
                          Ch-1 Revision of Chemical Reactions and Equations

                                                 Concept mapping
                                                   Lesson Notes

               Instructions:
                     Students you go through the mind map given based on the concepts
                       covered in previous 5 modules.
                     Go through the concept mapping given
                     Finally solve various conceptual questions given based on the various
                       concepts of the Chapter.



                                                      MIND MAP
               A] Chemical Changes-



                           Observations during aChemical Reaction













                 1. Colour change                                  2. Heat liberation
                                                                  (Zn + HCl  -> ZnCl + H +
                 (CuSO +Fe -> FeSO +Cu)                                                       2      2
                                                4
                           4
                 blue                          green                             heat)






                      3. Liberation of a gas         4.Change in state

                     (Zn + HCl  -> ZnCl + H         2(g) )          [H 2 (g)  + O 2(g)   ->   H O ]
                                             2
                                                                                              2 (l)








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