What is the order of the oxidizing power of perhalates?

C l O_{4}^{-} < B r O_{4}^{-} < I O_{4}^{-}

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I O_{4}^{-} < B r O_{4}^{-} < C l O_{4}^{-}

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C l O_{4}^{-} < I O_{4}^{-} < B r O_{4}^{-}

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B r O_{4}^{-} < C l O_{4}^{-} < I O_{4}^{-}

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Solution

The correct option is C $C l O_{4}^{-} < I O_{4}^{-} < B r O_{4}^{-}$
More the reduction potential value, more is the oxidising power.
The reduction potential of $B r O_{4}^{-}$ , $I O_{4}^{-}$ and $C l O_{4}^{-}$ are 1.85 V, 1.65 V and 1.20 V respectively. Thus $B r O_{4}^{-}$ has the the highest oxidising power and $C l O_{4}^{-}$ has the lowest oxidising power among the given perhalates.

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