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Question

How many moles of acidified FeSO4 can be completely oxidised by one mole of KMnO4?

A
10
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B
5
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C
6
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D
2
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Solution

The correct option is B 5
2KMnO4+3H2SO4K2SO4+2MnSO4+3H2O+5[O]
[2FeSO4+H2SO4+[O]Fe2(SO4)3+H2O]×5–––––––––––––––––––––––––––––––––––––––––––––––––––––
2KMnO4+10FeSO4+8H2SO4K2SO4+2MnSO4+5Fe2(SO4)3+8H2O–––––––––––––––––––––––––––––––––––––––––––––––––––––––––––––––––––––––––––––––––––
2 mole KMnO410 mole FeSO4
1 mole KMnO45 mole FeSO4.

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