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

1. HClO 4 > HOCl > HClO 2 > HClO 3
2. HClO 4 > HClO 3 > HClO 2 > HOCl
3. HClO 2 > HClO 4 > HClO 3 > HOCl
4. HOCl > HClO 2 > HClO 3 > HClO 4

Correct answer: HClO 4 > HClO 3 > HClO 2 > HOCl

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