Question

Classify the following reaction on the basis of energy change :

$3{\mathrm{O}}_2\stackrel{\mathrm{UV}\mathrm{rays}}{\to }2{\mathrm{O}}_3$

Answer 1

• Photochemical reactions are the reactions that take place by absorption of light energy.
• Generally, it takes place by the absorption of ultraviolet light, visible light, or infrared radiation.
• In the given reaction, oxygen is getting converted into ozone by the action of UV rays which is a component of light. So, it is a type of photochemical reaction.

$\underset{\mathrm{Oxygen}}{3{\mathrm{O}}_2\left(\mathrm{g}\right)}\stackrel{\mathrm{UV}\mathrm{rays}}{\to }\underset{\mathrm{Ozone}}{2{\mathrm{O}}_3\left(\mathrm{g}\right)}$

Hence, the answer is a photochemical reaction.