2023 · Q10
Which one of the following equations is the balanced chemical equation for the given reaction? Fe + H₂O –>Fe3O4 + H₂
General KnowledgeChemistry
- A$Fe + 4H_{2}O → Fe_{3}O_{4} + H_{2}$
- B$3Fe + H2O → Fe_{3}O_{4} + 2H_{2}$
- C3Fe + 4H2O → Fe3O4 + 4H2
- D3Fe + 4H2O → Fe3O4 + H2
Explanation
3Fe + 4H2O -> Fe3O4 + 4H2 balances every atom: Fe 3 = 3, H 8 = 8, O 4 = 4. In each of the other options at least one of the iron, hydrogen or oxygen counts differs between the two sides, so they are not balanced.