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

Explain the following in terms of gain or loss of oxygen with two examples each.

(a) Oxidation

(b) Reduction

Solution:

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

In equation (i), $\mathrm{H}_{2}$ is oxidized to $\mathrm{H}_{2} \mathrm{O}$ and in equation (ii), $\mathrm{Cu}$ is oxidised to $\mathrm{CuO}$.

(b) Reduction is the loss of oxygen.

For example,

In equation (i), $\mathrm{CO}_{2}$ is reduced to $\mathrm{CO}$ and in equation (ii), $\mathrm{CuO}$ is reduced to $\mathrm{Cu}$.