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Which of the following sequences correctly shows the acids in order of increasing acidity?

1. HOCl < HOClO < HOClO2 < HOClO3
2. HOClO < HOClO2 < HOCl < HOClO3
3. HOClO3 < HOClO2 < HOClO < HOCl
4. HOClO2 < HOClO3 < HOCl < HOClO

Correct answer: HOCl < HOClO < HOClO2 < HOClO3

Solution

The correct option reflects the increasing acidity of the hypochlorous acid derivatives, where the presence of more oxygen atoms generally increases acidity due to greater electronegativity and stability of the conjugate base.

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