Oxidation: Addition of oxygen or electronegative element to a atom, molecule, or ion or removal of hydrogen or electropositive element from an atom, molecule, orion is called oxidation.
Example: CO2+ H2 → CO+H2O (addition of O)
2Cu+O2→2CuO (addition of O)
Reduction: Addition of hydrogen or electropositive element to an atom, molecule, or ion or removal of Oxygen or electronegative element from a atom, molecule, or ion is called reduction.
Example: CO2 + H2 → CO+H2O
CuO+ H2 → Cu+H2O
