• # question_answer 51)   How is ozone produced in stratosphere?

In stratosphere, a photon with a wavelength between 180 and 240 nm breaks the ${{O}_{2}}$ molecule into atomic oxygen. ${{O}_{2}}+hv\xrightarrow[UV-radiaion]{(180-240nm)}O+O$ Oxygen molecule captures the atomic oxygen to form an ozone molecule. $M+{{O}_{2}}+O\to {{M}^{*}}+{{O}_{3}}+Heat$ Thus, overall balanced process of formation of ozone is: $3{{O}_{2}}+hv\to 2{{O}_{3}}+Heat$