Reduction potential of ions are given below: ccc ClO _4^ - & IO _… - Vidyadip

MCQ

Reduction potential of ions are given below:
$\begin{array}{ccc} ClO _4^{-} & IO _4^{-} & BrO _4^{-} \\ E ^{\circ}=1.19 V & E ^{\circ}=1.65 V & E ^{\circ}=1.74 V\end{array}$
The correct order of their oxidising power is:

A
$ClO _4^{-}> IO _4^{-}> BrO _4^{-}$
✓
$BrO _4^{-}> IO _4^{-}> ClO _4^{-}$
C
$BrO _4^{-}> ClO _4^{-}> IO _4^{-}$
D
$IO _4^{-}> BrO _4^{-}> ClO _4^{-}$

✓

Answer

Correct option: B.

$BrO _4^{-}> IO _4^{-}> ClO _4^{-}$

(B)
Higher the value of $\oplus$ve SRP (Std. reduction potential) more is tendency to undergo reduction, so better is oxidising power of reactant. Hence, ox. Power:- $BrO _4^{-}> IO _4^{-}> ClO _4^{-}$

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