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JEE CHEMISTRY MCQ: d & f- BLOCK ELEMENTS

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Analyzing +4 | -1
What happens when a molten mixture of K2FeO4\mathrm{K}_2 \mathrm{FeO}_4 and K2CrO4\mathrm{K}_2 \mathrm{CrO}_4 is acidified?
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Correct option: D
FeO42−\mathrm{FeO}_4{ }^{2-} is reduced to Fe3+\mathrm{Fe}^{3+} liberating O2\mathrm{O}_2
Option D is correct because in acidic conditions, FeO42−FeO_4^{2-} is unstable and gets reduced to Fe3+Fe^{3+} liberating oxygen gas.

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