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Answer:
Oxidation is a process in which an atom taking part in chemical reaction loses one or more electrons. Te loss of electrons results in the increase of positive charge ( or ) decrease of negative of the species.
Example :
Mg → Mg2+ + 2e- ( increase of positive charge )
Fe2+ → Fe3+ + e- ( increase of positive charge )
Cu → Cu2+ + 2e- ( increase of positive charge )
S2- → S + 2e- ( decrease of negative charge )
MnO42- → MnO4- + e- ( decrease of negative charge )
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