Redox reactions

         Redox reactions   
 The word redox is made up by the two words (red+ ox) .
Red means reduction and ox means oxidation.
So, the redox reaction is the type of reaction in which reduction and oxidation both are takes place.
Example-
Zn  + cuSo4 = ZnSo4  + Cu

(1) Oxidation reaction - 

The reaction in which the electron are loss by the atom, molecules or ions is known as the oxidation reaction.
Example-
Na = Na+   +  e-
                  OR

Oxidation is the process in which oxygen is added in the atoms, molecules or ions is known as the oxidation reaction.
2Mg + O2  = 2MgO

(2) Reduction reaction-

The reaction in which the electron are gain by the atom, molecules or ions is known as the oxidation reaction.
Example-
Cu + e- = Cu-

               OR
Reduction is the process in which oxygen is removed by the atoms, molecules or ions is known as the reduction reaction.
Example-
2H2O = 2H2 + O2