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EEJ MAIN Chemistry QUESTION #7192
Question 1
Among the following chemical species, identify the one that is incapable of undergoing a disproportionation reaction.
  • $BrO_{3}^{-}$
  • $BrO^{-}$
  • $BrO_{2}^{-}$
  • $BrO_{4}^{-}$✔️
Correct Answer Explanation

Disproportionation occurs when an element in a specific oxidation state can be both oxidized and reduced. This requires the element to be in an intermediate oxidation state.

  • In $BrO_{4}^{-}$, the oxidation state of Bromine is $+7$.
  • Since $+7$ is the maximum possible oxidation state for Bromine, it cannot be oxidized further.
  • Therefore, $BrO_{4}^{-}$ cannot undergo disproportionation.
[cite: 13]