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Question

Acid strength of oxoacids of chlorine is in order_________.

A
HOCl<HClO2<HClO3,<HClO4
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B
HClO4<HClO3<HClO2<HOCl
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C
HClO3<HClO4<HClO2<HOCl
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D
HClO2<HClO3<HOCl<HClO4
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Solution

The correct option is A HOCl<HClO2<HClO3,<HClO4
Among these, HClO4 is strongest because its conjugate base is most stable due to highest number of resonating structures.
As oxygen atom decreases, resonating structures decreases and acid become weak so order is HOCl<HClO2<HClO3,<HClO4.
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