HOClO < HOCl < HOClO₃ < HOClO₂

HOClO₃ < HOClO₂ < HOClO < HOCl

HOClO₂ < HOClO₃ < HOClO < HOCl

HOCl < HOClO < HOClO₂ < HOClO₃

They are used as cation exchangers.

They have open structure which enables them to take up small molecules.

Zeolites are aluminosilicates having three dimensional network.

Some of the SiO$$_4^{4 - }$$ units are replaced by AlO$$_4^{5 - }$$ and AlO$$_6^{9 - }$$ ions in zeolites.

Fe

Zn

K

Ca

Among halide ions, iodide is the most powerful reducing agent.

Fluorine is the only halogen that does not show a variable oxidation state.

HOCl is a stronger acid than HOBr.

HF is a stronger acid than HCl.