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Q 2615412360.     Choose the correct statement:

(This question may have multiple correct answers)

A 1 mole of `MnO_4^-` ion can oxidised 5 moles of `Fe^(2+)` ion in acidic medium
B 1 mole of `Cr_2O_7^(-)` ion can oxidised 6 moles of `Fe^(2+)` ion in acidic medium
C 1 mole of `Cu_2S` can be oxidised by 1.6 moles of `MnO_4^-` ion in acidic medium
D 1 mole of `Cu_2S` can be oxidised by 1.33 moles of `Cr_2O_7^(2-)` ion in acidic medium

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