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  4. Of the following compounds, which one is the strongest Bronsted acid in aqueous solution?

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Q. Of the following compounds, which one is the strongest Bronsted acid in aqueous solution?

WBJEEWBJEE 2017The p-Block Elements - Part2

Solution:

$\because$ Higher be the oxidation number of central atom in oxo-acids, more strongly it behave as Bronsted-acid.
Oxidation number for $Cl$ in $HClO _{3} \rightarrow+5$
Oxidation number for $Cl$ in $HClO _{2} \rightarrow+3$
Oxidation number for $Cl$ in $HClO \rightarrow+1$
Oxidation number for $Cl$ in $HBrO \rightarrow+1$
Hence, $HClO _{3}$ is the strongest Bronsted acid in aqueous solution.