Which is the strongest acid in the following ?

Options

A. `H_(2)SO_(4)`
B. `HClO_(3)`
C. `HClO_(4)`
D. `H_(2)SO_(3)`

Answer

C

Explanation

The strength of oxyacids can also be decided with the help of the oxidation number of central atom. Higher the oxidation number of central atom, more acidic is the oxyacid. `H_(2)overset(+6)(SO_(4)),Hoverset(+5)(ClO_(3)),Hoverset(+7)(ClO_(3)),Hoverset(+7)(ClO_(4)),H_(2)overset(+4)(SO_(3))` Order of acidic nature
`HClO_(4)gt H_(2)SO_(4)gt HClO_(3)gt H_(2)SO_(3)`
Since, in `HClO_(4)`, oxidation number of Cl is highest, so, `HClO_(4)` is the strongest acid among the given acids.