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NEET 2008
Exam
NEET
Year
2008
Subject
Chemistry
Chapter
Some Basic Concepts of Chemistry

NEET 2008 · Chemistry · Some Basic Concepts of Chemistry

Number of moles of MnO_4^ - required to oxidise one mole of ferrous...

Number of moles of MnO4−\mathrm{MnO}_4^{-}required to oxidise one mole of ferrous oxalate completely in acidic medium will be

Options

  1. A0.6 mole
  2. B0.4 mole
  3. C7.5 moles
  4. D0.2 mole

Correct answer

A. 0.6 mole

Step-by-step solution

Key Idea : MnO4−+5C2O42−+24H+⟶3Mn2++10CO2+12H2O\mathrm{MnO}_4^{-}+5 \mathrm{C}_2 \mathrm{O}_4^{2-}+24 \mathrm{H}^{+} \longrightarrow 3 \mathrm{Mn}^{2+}+10 \mathrm{CO}_2+12 \mathrm{H}_2 \mathrm{O} ∵\because Number of moles of MnO4−\mathrm{MnO}_4^{-}required to oxidise 5 moles of C2O42−=3\mathrm{C}_2 \mathrm{O}_4^{2-}=3 ∴\therefore Number of moles of MnO4−\mathrm{MnO}_4^{-}required to oxidise 1 mole of C2O42−=35=0.6 mol\mathrm{C}_2 \mathrm{O}_4^{2-}=\frac{3}{5} =0.6 \mathrm{~mol}
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