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Question

What is the order of the oxidizing power of perhalates?
  1. IO4<BrO4<ClO4
  2. ClO4<BrO4<IO4
  3. ClO4<IO4<BrO4
  4. BrO4<ClO4<IO4


Solution

The correct option is C ClO4<IO4<BrO4
More the reduction potential value, more is the oxidising power.
The reduction potential of BrO4, IO4 and ClO4 are 1.85 V, 1.65 V and 1.20 V respectively. Thus BrO4 has the the highest oxidising power and ClO4 has the lowest oxidising power among the given perhalates.

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