Among the following oxoacids, the correct decreasing order of acid strength is:

H C l O_{4} > H C l O_{3} > H C l O_{2} > H O C l

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H C l O_{2} > H C l O_{4} > H C l O_{3} > H O C l

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H O C l > H C l O_{2} > H C l O_{3} > H C l O_{4}

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H C l O_{4} > H O C l > H C l O_{2} > H C l O_{3}

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Solution

The correct option is B $H C l O_{4} > H C l O_{3} > H C l O_{2} > H O C l$
Acidic strength $\propto$ Oxidation number

Increasing acid strength due to an increase in the oxidation state of the central atom.

$H C l O < H C l O_{2} < H C l O_{3} < H C l O_{4}$

$+ 1$ $+ 3$ $+ 5$ $+ 7$

Hence, option $A$ is correct.

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