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UPSC CDS 2 2023 GK Paper

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Question : 10

Total: 120

Which one of the following equations is the balanced chemical equation for the given reaction?
Fe + H₂O → Fe₃O₄ + H₂

Fe + 4H₂O → Fe₃O₄ + H₂
3Fe + H2O → Fe₃O₄ + 2H₂
3Fe + 4H2O → Fe3O4 + 4H2
3Fe + 4H2O → Fe3O4 + H2

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