Chemistry - Complete Pblock- Question with Solution | TestHub

As the oxidation state of the halogen atom increases, the halogen-oxygen bond becomes more and more covalent. As a result, the thermal stability of the oxo acid increases. Thus,$\mathrm{H}\mathrm{C}\mathrm{l}{\mathrm{O}}_4$is most stable to heat; whereas HClO is least stable to heat.