An oxide, \( \mathrm{X}_{2} \mathrm{O}_{3} \) is oxidized to \( \ma...

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An oxide, \( \mathrm{X}_{2} \mathrm{O}_{3} \) is oxidized to \( \mathrm{XO}_{4}^{-} \)by \( \mathrm{Cr}_{2} \mathrm{O}_{7}^{2-} \) in
P acid medium. The number of moles of \( \mathrm{X}_{2} \mathrm{O}_{3} \)

W oxidized per mole of \( \mathrm{Cr}_{2} \mathrm{O}_{7}{ }^{2-} \) is
(1) \( 3 / 4 \)
(2) 3
(3) \( 3 / 2 \)
(4) \( 2 / 3 \)
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