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