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Which of the following statements is not true?

1. HF is a stronger acid than HCl
2. Among halide ions, iodide is the most powerful reducing agent
3. Fluorine is the only halogen that does not show a variable oxidation state
4. HOCl is a stronger acid than HOBr

Correct answer: HF is a stronger acid than HCl

Solution

HF is not a stronger acid than HCl because HF has a very strong hydrogen bonding, which makes it less likely to dissociate completely in water compared to HCl.

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