MCQ
Number of moles of $\mathrm{H}^{+}$ions required by $1 \mathrm{~mole}$ of $\mathrm{MnO}_4^{-}$to oxidise oxalate ion to $\mathrm{CO}_2$ is . . .. . .
- ✓$8$
- B$10$
- C$15$
- D$20$
✓
Answer
Correct option: A.
$8$
a
$2 \mathrm{MnO}_4^{-}+5 \mathrm{C}_2 \mathrm{O}_4^{2-}+16 \mathrm{H}^{+} \longrightarrow 2 \mathrm{Mn}^{2+}+10 \mathrm{CO}_2+8 \mathrm{H}_2 \mathrm{O}$
$2 \mathrm{MnO}_4^{-}+5 \mathrm{C}_2 \mathrm{O}_4^{2-}+16 \mathrm{H}^{+} \longrightarrow 2 \mathrm{Mn}^{2+}+10 \mathrm{CO}_2+8 \mathrm{H}_2 \mathrm{O}$
$\therefore$ Number of moles of $\mathrm{H}^{+}$ions required by 1 mole of
$\mathrm{MnO}_4^{-}$to oxidise oxalate ion to $\mathrm{CO}_2$ is 8
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