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SAI International School
                                                       Class-X

                                               Subject_ Chemistry
                                 Topic-Chemical Reactions and Equations
                                       Sub topic-Corrosion & Rancidity

                                                      Mind Map




               Examples of OXIDATION-


                      CORROSIONRANCIDITY
               The wearing out of metals layer by layer,              The oxidation of fats and Oil
               due to their reaction with atmospheric present in food itemsto give
               gases,in presence of moisture,is knownout afoul smell and bitter
               as Corrosion. taste  is  known as Rancidity.


                     CORROSION-
                   Corrosion may be of two types:




               This phenomenon protects the                         This phenomenon destroys the
               metal from further corrosion                        metal gradually or makes the
               Example- Corrosion of Al, Mg, Zn                      surface dull & lustre less.
                                                                      Example- a. Rusting of Fe,
                                                                                 b. Tarnishing of Ag,
                                                                                  c. Corrosion of Cu.




                     RANCIDITY-


               What is RancidityMethods for Prevention of Rancidity
                                                                                    a.Adding antioxidants.
                                                                                    b.Storing food in airtight containers.
               Oxidation of Fats & Oil                                    c. Refrigerating food items.
                                                                                    d. Flushing food packets with Nitrogen.

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