science class 10 oxidation, reduction and redox chemical reaction

Chemistry x - OXIDATION AND REDUCTION

Oxidation: A chemical reaction which involves addition of oxygen or removal of hydrogen or loss of electron(s) is called as oxidation.
2Mg + O2 →2MgO (addition of oxygen)
H2S + Br2 → 2HBr + S (removal of hydrogen)

Fe2+ → Fe3+ + e- (loss of electron)
Reduction: A chemical reaction which involves addition of hydrogen or removal of oxygen or gain of electron(s) is called as reduction.
2Na + H2 → 2NaH (addition of hydrogen)
CuO + H2 → Cu + H2O(removal of oxygen)
Fe3+ + e- → Fe2+ (gain of electron)
Redox reaction: A chemical reaction in which oxidation and reduction take place simultaneously is called redox reaction.
Zn + CuSO4 → Cu + ZnSO4
ZnO + C → Zn +CO
MnO2 + HCl → MnCl2 + H2 O + Cl2

OXIDATION AND REDUCTION Ch. Chemical and chemical Equations

In our daily life we come across phenomena like fading of the colours of the clothes, burning of combustible substances like cooking gas, wood and coal, and also rusting of iron articles.

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