Write a balanced chemical equation of the following reactions and also classify them.
Iron (II) oxide on heating with carbon monoxide gas reacts to form solid iron and liberates carbon dioxide gas.

Explanation

**Step-by-Step Solution:**

1. **Identify the Reactants and Products:**
The reactants in this reaction are Iron (II) oxide (FeO) and carbon monoxide (CO). The products are solid iron (Fe) and carbon dioxide (CO₂).

2. **Write the Unbalanced Equation:**
The unbalanced chemical equation can be written as:
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