Which of the following is the weakest acid?

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(A) The acidity of oxyacids of chlorine increases with the oxidation state of the central chlorine atom. Therefore,$HClO$ (oxidation state $+1$) is we

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$HClO$

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(A) The acidity of oxyacids of chlorine increases with the oxidation state of the central chlorine atom. Therefore,$HClO$ (oxidation state $+1$) is weaker than $HClO_3$ (oxidation state $+5$).Comparing $HCl$ and $HBr$,the bond dissociation energy of $H-Cl$ is higher than $H-Br$ due to the smaller size of $Cl$,making $HCl$ a weaker acid than $HBr$ in terms of proton release in certain solvents,but generally,$HClO$ is considered the weakest among the given options due to the low oxidation state of chlorine and the nature of the $O-H$ bond.

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