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Perchloric acid is strongest acid, but w...

Perchloric acid is strongest acid, but weakest oxidising agent. Why? 

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`HCIO_4` has `pK_a "larr" 10`. Its ability to provide proton is highest. This is due to resonance stabilisation of perchlorate ion. `ClO_4^(-)`, has four cannonical structures and six delocalised pi electrons. Since `ClO_(4)^(-)`, is resonance stabilised, it does not furnish oxygen and hence a weak oxidising agent.
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Knowledge Check

  • Which is not an oxidising agent ?

    A
    `KClO_3`
    B
    `O_2`
    C
    `C_(6)H_(12)O_6`
    D
    `K_2Cr_(2)O_7`

  • Which of the following is the strongest oxidising agent?

    A
    `F_(2)`
    B
    `Br_(2)`
    C
    `Cl_(2)`
    D
    `O_(2)`

  • The strongest acid among the following is

    A
    B
    C
    D

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