COMEDK · Chemistry · 9. Redox Reactions
\(\mathrm{KMnO}_4\) acts as an oxidising agent in acidic medium. The number of moles of \(\mathrm{KMnO}_4\) that will be required to react with one mole of oxalate ions (to form \(\mathrm{CO}_2\) ) in acidic solution is
- A \(\frac{2}{5}\)
- B \(\frac{5}{2}\)
- C 5
- D \(\frac{5}{4}\)
Answer & Solution
Correct Answer
(A) \(\frac{2}{5}\)
Step-by-step Solution
Detailed explanation
\[ \begin{aligned} \mathrm{MnO}_4^{-}+8 \mathrm{H}^{+}+5 e^{-} & \left.\longrightarrow \mathrm{Mn}^{2+}+4 \mathrm{H}_2 \mathrm{O}\right] \times 2 \\ \mathrm{C}_2 \mathrm{O}_4^{2-} \longrightarrow & \left.\mathrm{CO}_2+2 e^{-}\right] \times 5 \end{aligned} \]…
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