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One mole of potassium dichromate completely oxidizes the following number of moles of ferrous sulphate in acidic medium

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answer is C.

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Detailed Solution

The reaction between Ferrous sulphate & potassium permanganate is given as :

2KMnO₄ + 8H₂SO₄+ 10FeSO₄ → K₂SO₄+ 2MnSO₄+ 8H₂O + 5Fe(SO₄)₃
Therefore, by stoichiometry,

2 moles of KMnO₄≡ 10 moles of FeSO₄

Therefore, 1 mole of KMnO₄≡ 5 moles of FeSO₄

Therefore, 5 moles of ferrous sulphate are oxidized by 1 mole of potassium permanganate in acidic medium.

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