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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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AAKASH SERIES-VIIA GROUP ELEMENTS -PRACTICE EXERCISE
  1. Perchloric acid is strongest acid, but weakest oxidising agent. Why?

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  2. Fluorine does not exhibit positive oxidation states because

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  3. When I2 is passed through KCI, KF and KBr solutions

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  4. Oxidation of thiosulphate with iodine gives

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  5. The order of acidic character of hydrogen halides is

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  6. Which of the following can be prepared only by electrolysis

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  7. The Ionic radius of Br^(-1) is 1.96A^@ and the Ionic radius of I^(-1) ...

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  8. The isoelectronic pair is

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  9. The halogen having Greenish - yellow gas reacts with hot and concentra...

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  10. {:("List I", "List II"),((A) H2 + F2, (1) "Slow in dark but fast in su...

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  11. Which of the following has highest hydration energy ?

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  12. The SRP for the different halogens is in the order of

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  13. Which of the following shows variation of electron gain enthalpy value...

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  14. The purpose of addition of KF to HF in the preparation of Fluorine by ...

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  15. The bond not present in KHF2 is

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  16. The F2 liberated at the anode in the whytlaw Gray method is passed thr...

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  17. H2S + 4F2 to 2HF + B The shape of molecule of compound B is

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  18. NH3 + 3F2 to A+ 3HF The correct statement regarding A is

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  19. 4HCI + A to MnCl2 + Cl2 uarr + 2H2O, In this reaction the change in ox...

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  20. Bond angles in Cl2 O and ClO2, are

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  21. In the reaction of Cl2 with Na2 SO3, chlorine acts as

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