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Question

The number of moles of KMnO4 that will be needed to react completely with one mole of ferrous oxalate in an acidic solution is:

A
35
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B
25
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C
45
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D
15
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Solution

The correct option is A 35
The balanced reaction is
2KMnO4+5C2O24+16H+2Mn2++2K++10CO2+8H2O
and
KMnO4+5Fe2++8H+K++5Fe3++Mn2++4H2O
5 moles of FeC2O4 require 3 moles of KMnO4
1 mole of FeC2O4 requires 35 moles of KMnO4
We can also solve this by equating equivalents of both the compounds.

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