JEE Mains · Chemistry · STD 12 - 4. d and f- block elements
In alkaline medium, the reduction of permanganate anion involves a gain of \(........\) electrons.
- A \(4\)
- B \(5\)
- C \(3\)
- D \(7\)
Answer & Solution
Correct Answer
(C) \(3\)
Step-by-step Solution
Detailed explanation
In faintly alkaline medium, \(MnO _4^{-}+3 e ^{-}+2 H _2 O \longrightarrow MnO _2+4 OH ^{-}\) No. of electrons gained \(=3\)
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