Which of the following is the strongest acid?

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(D) The strength of oxoacids depends on the oxidation state of the central atom and the stability of the conjugate base.$(1)$ In $HClO$, the oxidation

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$HClO_4$

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(D) The strength of oxoacids depends on the oxidation state of the central atom and the stability of the conjugate base.$(1)$ In $HClO$, the oxidation state of $Cl$ is $+1$.$(2)$ In $HClO_2$, the oxidation state of $Cl$ is $+3$.$(3)$ In $HClO_4$, the oxidation state of $Cl$ is $+7$.$(4)$ In $H_2SO_4$, the oxidation state of $S$ is $+6$.As the oxidation state of the central atom increases, the electron density on the central atom decreases, which increases the polarity of the $O-H$ bond and stabilizes the conjugate base. Among the given options, $HClO_4$ has the highest oxidation state $(+7)$ for the central atom, making it the strongest acid.

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