Question

Statement 1 : Amongst the oxo acids of halogens, $HOCl, HOBr$ and $HOI$, the $HOI$ is the most acidic acid.
Statement 2 : The conjugate base stability is
$CIO^- > BrO^- > IO^-$

• A. If both Statement $1$ and Statement $2$ are true and the statement $2$ is the correct explanation of the statement $1$
• B. If both Statement $1$ and Statement $2$ are true but statement $2$ is not the correct explanation of the statement $1$
• C. If Statement $1$ is true but Statement $2$ is false
• D. If Statement $1$ is false but Statement $2$ is true

Answer 1

Answer: (D)

Order of acidic character is $HClO > HBrO > HIO$ as the order of the stability of their conjugate base is $ClO^- > BrO^- > IO^-$; because Cl being small size atom can form effective $\pi$ -bond with oxygen.