Compare the acidic strength of `HClO_4`, `HClO_3`, `HClO_2`, HClO. Give reasons.

Explanation

Acidic strength : `HCIO_4 gt HCIO_3 gt HCIO_2 gt HCIO`
Reason: More the stability of conjugate base formed, more is the acid strength. Stability of conjugate base formed is in the order :
`ClO_4^(-) gt ClO_3^(-) gt ClO_2^(-) gt ClO^(-)` This is because of greater dispersal of negative charge when the number of O-atom attached to halogen atom are more. Therefore acidic strength of these oxo-acids is in the order :
`HClO_4 gt HClO_3 gt HClO_2 gt HClO`