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Question

2 mol of FeSO4 in acid medium is oxidized by x mol of KMnO4, whereas 2 mol of FeC2O4 in acid medium is oxidized by y mol of KMnO4. The ratio of x and y is :

A
13
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B
12
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C
14
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D
15
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Solution

The correct option is A 13
The balanced reactions are given below:
2KMnO4+10FeSO4+8H2SO45Fe2(SO4)3+K2SO4+2MnSO4+8H2O
and
10FeC2O4+6KMnO4+24H2SO43K2SO4+6MnSO4+5Fe2(SO4)3+24H2O+20CO2
So, from the reactions, we get
xy=410×1012=13.

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