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Question

Identify the strongest acid among the following.

A
HOCl
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B
HClO2
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C
HClO3
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D
HClO4
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Solution

The correct option is D HClO4
The acidic nature of oxoacid of the same halogen but different oxidation state increases with the increase in oxidation number of halogen. As the number of oxygen atom increases, the negative charge dispersal becomes more from Cl atom because of electronegativity of the oxygen atom that increases its acidic strength. Thus HClO4is the strongest acid among other oxoacids.

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