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In order to oxidise a mixture of one mole of each of \( \mathrm{FeC}_{2} \mathrm{O}_{4} \),
\( \mathrm{P} \) \( \mathrm{Fe}_{2}\left(\mathrm{C}_{2} \mathrm{O}_{4}\right)_{3}, \mathrm{FeSO}_{4} \) and \( \mathrm{Fe}_{2}\left(\mathrm{SO}_{4}\right)_{3} \) in acidic medium, the number of moles of \( \mathrm{KMnO}_{4} \) required is (2019 Main, 8 April I)
W
(a) 2
(b) 1
(c) 3
(d) \( 1.5 \)
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