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Question

For the decolorisation of 1 mole of KMnO4, the number of moles of H2O2 required is

A
1/2
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B
3/2
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C
5/2
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D
7/2
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Solution

The correct options are
A 1/2
C 5/2
Balanced equation of decolorization of KMnO4
2KMnO4+5H2O2+3H2SO4K2SO4+2MnSO4+8H2O+5O2
From the equation we say that 2 moles of KMnO4 is decolorized by 5 moles H2O2.
So 1 mole of KMnO4 is decolorized by 5/2 moles H2O2.
Hence option C is orrect.

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