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Question

1 mol of ferric oxalate is oxidized by x mol of MnO4 and also 1 mol of ferrous oxalate is oxidised by y mol of MnO4 in acidic medium. The ration xy is:

A
2 : 1
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B
1 : 2
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C
3 : 1
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D
1 : 3
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Solution

The correct option is A 2 : 1
Fe2(204)3+MnO4Mn2++Co2
1×6=x×5
x=65
MnO4+FeC2O4Mn2++Fe3++Co2
4-factor = 2 + 1 = 3
y×5=1×3
y=35
xy=65/35=2:1

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