Question

Define the term redox reaction.

Answer 1

• Redox reactions are the reactions in which both oxidation and reduction take place simultaneously.

Example:

$\underset{\mathrm{Lead}\mathrm{oxide}}{\mathrm{PbO}\left(\mathrm{s}\right)}+\underset{\mathrm{Hydrogen}}{{\mathrm{H}}_2\left(\mathrm{g}\right)}\to \underset{\mathrm{Lead}}{\mathrm{Pb}\left(\mathrm{s}\right)}+\underset{\mathrm{Water}}{{\mathrm{H}}_2\mathrm{O}\left(\mathrm{l}\right)}$

• Here hydrogen is oxidized to water and lead oxide is reduced to lead.
• Hence this is a redox reaction.