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Question

The correct order of acid strength of oxyacids is:

A
HClO>HClO2>HClO3>HClO4
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B
HClO2>HClO3>HClO>HClO4
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C
HClO4>HClO3>HClO2>HClO
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D
HClO3>HClO4>HClO>HClO2
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Solution

The correct option is D HClO4>HClO3>HClO2>HClO
The acid strength of oxyacids of the same halogen increases with increase in oxidation state of the halogen +7HClO4>+5HClO3>+3HClO2>+1HClO.
Thus Cl in HClO4 is in highest oxidation state (+7) and hence strongest acid, while HClO(Cl is in +1 oxidation state) is weakest.

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