Consider the proposed mechanism for the destruction of ozone in the stratosphere:

$\begin{array}{r}{\mathrm{O}}_3+\mathrm{Cl}⟶\mathrm{ClO}+{\mathrm{O}}_2\\ \mathrm{ClO}+{\mathrm{O}}_3⟶\mathrm{Cl}+2{\mathrm{O}}_2\end{array}$

Which of the statements about this mechanism is correct?

Overall Reaction

$\mathrm{step} 1: \mathrm{Cl}+{\mathrm{O}}_3\to \mathrm{ClO} + {\mathrm{O}}_2$

$\text{ step 2: }\mathrm{ClO}+ {\mathrm{O}}_3 \to \mathrm{u} + {\mathrm{O}}_2$

$\begin{array}{r}\mathrm{Cl} \left(g\right)+\text{ClO (g) }+2{\mathrm{O}}_3\left(g\right)\to Cl\mathit{ }\left(g\right) +\mathrm{ClO} \left(g\right)+2{\mathrm{O}}_3\left(g\right)\\ \end{array}$

$2{\mathrm{O}}_3\left(\mathrm{g}\right)\to 3{\mathrm{O}}_2$

$\mathrm{Cl} \left(\mathrm{g}\right)\to$reactant at step 1, but it is in regenerated in step 2, using generated to step 2$\to \mathrm{Cl}\to \mathrm{catalyst}$

$\mathrm{ClO}\to \text{ genenared in step 1 }\to \text{ consumes in step }2$