$Cl+O_3\rightarrow x+O_2,ClO+O\rightarrow y+O_2$.Net reaction :$O_3+O\quad\underrightarrow {Cl}\quad z$.The $y$ is

Question

$\begin{array}{1 1}(a)\;Cl_3\\(b)\;Cl_2\\(c)\;Cl\\(d)\;Cl^-\end{array}$