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Q. How many electrons are involved during the oxidation reaction of $ KMnO_4 $ in acidic medium ?

J & K CETJ & K CET 2018The d-and f-Block Elements

Solution:

Reaction of $KMnO_{4}$ in acidic medium :
$MnO^{-}_{4}+8H^{+}+5e^{-} \to Mn^{2+}+4H_{2}O$