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SAI INTERNATIONAL SCHOOL
                                                      CLASS-VII
                                             SUBJECT- CHEMISTRY
                              TOPIC-PHYSICAL AND CHEMICAL CHANGES
                          SUB TOPIC- SOME COMMON CHEMICAL CHANGES







                                                     MIND MAP








                                                    COMMON
                                                    CHEMICAL

                                                    CHANGES






                                        RUST







                                                  CONDITIONS                  PREVENTION OF
                  COMPOSITION                       FOR RUST                          RUST

                      OF RUST
                                                  FORMATION                      FORMATION

























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