What happen when iron is treated with:
(i). Steam
(ii). Dilute `HNO_3`

Explanation

To solve the question of what happens when iron is treated with steam and dilute HNO3, we will analyze each reaction step by step.

### Step 1: Reaction of Iron with Steam
1. **Write the Reactants**: The reactants are iron (Fe) and steam (H2O).
2. **Identify the Reaction**: When iron reacts with steam, it forms iron(II,III) oxide (Fe3O4) and hydrogen gas (H2).
3. **Write the Balanced Equation**:
- The unbalanced reaction can be written as:
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