JEE Mains · Chemistry · STD 12 - 4. d and f- block elements
In neutral or faintly alkaline medium, \(KMnO _{4}\) being a powerful oxidant can oxidize, thiosulphate almost quantitatively, to sulphate. In this reaction overall change in oxidation state of manganese will be
- A \(5\)
- B \(1\)
- C \(0\)
- D \(3\)
Answer & Solution
Correct Answer
(D) \(3\)
Step-by-step Solution
Detailed explanation
\(8 MnO _{4}{ }^{+7}+3 S _{2} O _{3}{ }^{2-}+ H _{2} O \rightarrow 8 MnO _{2}+6 SO _{4}{ }^{2-}+2 OH ^{-}\) Change in oxidation state of \(Mn\) is from \(+7\) to \(+4\) which is \(3 .\)
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