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Q. Which is the strongest acid in the following?

NTA AbhyasNTA Abhyas 2022

Solution:

Acidic nature $ \propto $ electro negativity and oxidation number of central atom.
Here $HClO_{4}$ is the strongest acid and decreasing order of acidic strength is as follows
$HClO_{4}>HClO_{3}>H_{2}SO_{4}>H_{2}SO_{3}$