How many moles of acidified FeSO4 can be completely oxidised by onemole 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 B5 2KMnO4+3H2SO4→K2SO4+2MnSO4+3H2O+5[O] [2FeSO4+H2SO4+[O]→Fe2(SO4)3+H2O]×5––––––––––––––––––––––––––––––––––––––––––––––––––––––– 2KMnO4+10FeSO4+8H2SO4→K2SO4+2MnSO4+5Fe2(SO4)3+8H2O––––––––––––––––––––––––––––––––––––––––––––––––––––––––––––––––––––––––––––––––––––– 2moleKMnO4≡10moleFeSO4 1moleKMnO4≡5moleFeSO4.