1. Tardigrade
  2. Question
  3. Chemistry
  4. Identify the correct decreasing order of acid strength for the following compounds: (I) HClO, (II) HBrO, (III) HIO

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Q. Identify the correct decreasing order of acid strength for the following compounds:
(I) HClO, (II) HBrO, (III) HIO

NTA AbhyasNTA Abhyas 2022

Solution:

The acidic character of hypohalous acid depends on the electronegativity of halogen. As the electronegativity value of halogen increases the acidic strength of hypohalous acid increases. Here, Electronegativity of atom $X$ ( $Cl , Br$ or $I$ ) attached to $O$ decreases down the group, polarity of $OH$ bond decreases, acid strength decreases. It means more the electronegativity of the halogen atom, more the tendency to pull electron and weaker the $O - H$ bond and hence proton $\left(( H )^{+}\right)$can easily be removed.