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Question

Among the following, the correct order of acidity is


A

HClO2<HClO<HClO3<HClO4

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B

HClO4<HClO2<HClO<HClO3

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C

HClO3<HClO4<HClO2<HClO

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D

HClO<HClO2<HClO3<HClO4

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Solution

The correct option is D

HClO<HClO2<HClO3<HClO4


The acidic character of the oxoacids increases with increase in oxidation number of the halogen atom i.e., HClO<HClO2<HClO3<HClO4. The can be explained on the basis of relative stability of the anions left after removal of a proton. Stability of the anions left after removal of a proton. Since the stability of the anion decreases in the order : ClO4>ClO3>ClO2>ClO, acid strength also decrease in the same order.


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