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MODEL PAPER 4 — Science STD 10 — Question

CBSE BoardEnglish MediumSTD 10ScienceMODEL PAPER 41 Mark
MCQ
Chemically rust is:
  • A
    Metal oxide
  • B
    Ferric oxide
  • C
    Ferrous oxide
  • ✓
    Hydrated ferric oxide
✓

Answer

Correct option: D.
Hydrated ferric oxide
Rust is an iron oxide, a usually red oxide formed by the redox reaction of iron and oxygen in the presence of water or air moisture. Chemically, rust is a hydrated ferric oxide $\ce{(Fe_2O_3. H_2O).}$

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