Arrange `HCIO_4` , `HCIO_3`, `HCIO_2, HCIO` in order of oxidizing power. Give reasons.

Explanation

Oxidizing power :`HClO_4 lt HClO_3 lt HClO`
Reason: As the stability of the oxoanion increases, its tendency to decompose to give `O_2` decreases and hence its oxidising power decreases. Since the stability of the oxoanion decreases in the order :
`ClO_4^(-) gt ClO_3^(-) gt ClO_2^(-) gt ClO^(-)` , therefore , the oxidising power of their oxoacids increases in the reverse order , i.e. ,
`HClO_4 gt HClO_3 gt HClO_2 gt HClO`