Explain redox reaction with suitable example.

Explanation

The reaction which involves simultaneous oxidation and reduction is called an oxidation-reduction or redox reaction.
In a redox reaction, one reactant gets oxidised while the other gets reduced during a reaction.
Redox reaction = Reduction + Oxidation
In redox reaction, the reductant is oxidised by the oxidant and the oxidant is reduced by the reductant.
Example : `CuO_((s)) + H_(2(g)) + H_(2)O`
In this reaction, oxygen is removed from copper oxide therefore it is a reduction of CuO, while hydrogen accepts oxygen to form water that means oxidation of hydrogen take place. THus oxidation and reduction reactions occur simultaneously.
Other examples of redox reactions :
`underset("Hydrogen")(2H_(2)S) + underset("sulphide")(SO_(2)) tounderset("Sulphur")(3S) + 2H_(2)O`
`underset("Manganese dioxide")(MnO_(2))+4HCl to underset("Manganese chloride")(MNCl_(2))+2H_(2)O+Cl_(2)uparrow`