Question

Explain the following in terms of gain or loss of oxygen with two examples each.
(a) Oxidation
(b) Reduction

Answer 1

(a) Oxidation is the gain of oxygen**.**
For example:

In equation (i), H2 is oxidized to H2O and in equation (ii), Cu is oxidised to CuO.

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(b) Reduction is the loss of oxygen.
For example :

In equation (i), CO2 is reduced to CO and in equation (ii), CuO is reduced to Cu.