JEE Mains · Chemistry · STD 12 - 4. d and f- block elements
\(KMnO _4\) oxidises \(I ^{-}\)in acidic and neutral/faintly alkaline solution, respectively to
- A \(I _2\) and \(IO _3^{-}\)
- B \(IO _3^{-}\) and \(I _2\)
- C \(IO _3^{-}\) and \(IO _3^{-}\)
- D \(I_2\) and \(I_2\)
Answer & Solution
Correct Answer
(A) \(I _2\) and \(IO _3^{-}\)
Step-by-step Solution
Detailed explanation
In acidic medium \(2 MnO _4^{-}+10 I ^{-}+16 H ^{+} \rightarrow 2 Mn ^{2+}+5 I _2+8 H _2 O\) In neutral/faintly alkaline solution \(2 MnO _4^{-}+ I ^{-}+ H _2 O \rightarrow 2 MnO _2+2 OH ^{-}+ IO _3^{-}\)
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