When iron is heated with steam at very high temperature, the products are
AMagnetic iron oxide (Fe3O4) and hydrogen
BIron carbonate and carbon dioxide gas
CIron sulphate and sulphur dioxide gas
DIron chloride and chlorine gas only
Answer & Solution
Correct answer: A. Magnetic iron oxide (Fe3O4) and hydrogen
1. At red heat, iron reacts with steam.
2. The product is Fe3O4 (magnetic iron oxide).
3. Hydrogen is liberated in this reversible reaction.
4. Equation: 3 Fe + 4 H2O -> Fe3O4 + 4 H2.
_Source: Selina Concise Chemistry Class 8, Ch on Hydrogen (Mistral OCR'd PDF), section on iron + steam_
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