Explanation:
\({\text{Chlorous}}\,\,{\text{acid: HCl}}{{\text{O}}_{\text{2}}}{\text{ + 3}}\,\,{\text{for}}\,\,\) ' \({\text{Cl}}\) '
\({\text{Chloric}}\,\,{\text{acid:}}\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,{\text{HCl}}{{\text{O}}_{\text{3}}},{\text{ + 5 for}}\) ' \({\text{Cl}}\) '
\({\text{Perchloric}}\,\,{\text{acid:}}\,\,\,\,\,\,\,\,\,\,\,{\text{HCl}}{{\text{O}}_{\text{4}}},{\text{ + 7 for}}\) ' \({\text{Cl}}\) '
\({\text{Hypochlorous}}\,\,{\text{acid: HOCl}},{\text{ + 1 for}}\) ' \({\text{Cl}}\) '