Question

Give an example of a photo decomposition reaction?

Answer 1

Photo decomposition reaction:

A chemical reaction in which reactants break down into two or more products when exposed to light is called a photodecomposition reaction.

For example:

$2{\mathrm{H}}_2{\mathrm{O}}_2\left(\mathrm{l}\right)\stackrel{\mathrm{Light}}{\to }2{\mathrm{H}}_2\mathrm{O}\left(\mathrm{l}\right)+{\mathrm{O}}_2\left(\mathrm{g}\right)$

Here, when hydrogen peroxide$\mathbf{\left(}{\mathbf{H}}_{\mathbf{2}}{\mathbf{O}}_{\mathbf{2}}\mathbf{\right)}$ is exposed to light it breakdown into water$\mathbf{\left(}{\mathbf{H}}_{\mathbf{2}}\mathbf{O}\mathbf{\right)}$ and oxygen$\mathbf{\left(}{\mathbf{O}}_{\mathbf{2}}\mathbf{\right)}$.

Therefore, this is the required explanation.