The reaction of \( \mathrm{HClO_3} \) with \( \mathrm{HCl} \) gives a paramagnetic gas, which upon reaction with \( \mathrm{O_3} \) produces.
\( \mathrm{Cl_2O} \)
\( \mathrm{ClO_2} \)
\( \mathrm{Cl_2O_6} \)
\( \mathrm{Cl_2O_7} \)
