Fe + H2O → Fe3O4 + H2 या अभिक्रियेसाठी योग्य संतुलित समीकरण पर्याय निवडा.

1
3Fe + 4H₂O → Fe₃O₄ + 2H₂
2
2Fe + 4H₂O → Fe₃O₄ + 4H₂
3
3Fe + 4H₂O → Fe₃O₄ + 4H₂
4
4Fe + 4H₂O → Fe₃O₄ + 4H₂

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