Which property of halogen acids indicated below is incorrect?

H F > H C l > H B r > H I

(acidic strength)

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H I > H B r > H C l > H F

(reducing strength)

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H I > H B r > H C l > H F

(bond length)

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H F > H C l > H B r > H I

(thermal stability)

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Solution

The correct option is B $H F > H C l > H B r > H I$ (acidic strength)
Among the halogen acids as the size of the halogen decreases the acidic nature of acids increases. As size decreases electron acceptiong capacity (acidic strength increases.
$H F > H C l > H B r > H I$ is the correct order of acidic strength.
Hence option $A$ is correct.

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