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Q. The acid strength of the following oxoacids of chlorine is highest

AMUAMU 2012

Solution:

Acidic strength of oxoacids of same halogen increases with increase in oxidation number of halogen atom.
$\underset{(+1)}{ HClO }<\underset{(+3)}{ HClO _{2}}<\underset{(+5)}{ HClO _{3}}<\underset{(+7)}{ HClO _{4}}$