pBlock ElementsII - Result Question 136

####21. Which of the following is not oxidised by $O _3$ ? $(2005,1 M)$

(a) KI

(b) $FeSO _4$

(c) $KMnO _4$

(d) $K _2 MnO _4$

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Solution:

  1. In $KMnO _4, Mn$ is already in its highest oxidation state (+7), cannot be oxidised by any oxidising agent.


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