The strongest Bronsted base in the following anion is

Options

A. `CIO^(Theta)`
B. `CIO_(2)^(Theta)`
C. `CIO_(3)^(Theta)`
D. `CIO_(4)^(Theta)`

Answer

A

Explanation

In oxy acids of halogens, the higher the oxidation state of the halogen, the stronger the acid. The order of acidic strength is
`HCIO_(4) gt HCIO_(3) gt HCIO_(2) gt HCIO`
The order of basic strength is
`CIO_(4)^(Theta) lt CIO_(3)^(Theta) lt CIO_(2)^(Theta) lt CIO^(Theta)`
The stronger the acid, the weaker the conjugate base and vice versa.