An increase in pressure favors the formation of ozone
Explanation;
Ozone, O3, decomposes to molecular oxygen in the stratosphere according to the reaction
2O3(g) ⇆ 3O2 (g).
There are more moles of product gas than moles of reactant gas. An increase in total pressure increases the partial pressure of each gas, shifting the equilibrium towards the reactants.
Therefore; an increase in pressure favors backward reactions towards the formation of ozone.
