What happens when dilute hydrochloric acid is added to iron filings? Choose the correct answer.

Options

A. Hydrogen gas and iron chloride are produced
B. Chlorine gas and iron hydroxide are produced
C. No reaction takes place
D. Iron and water are produced

Explanation

### Step-by-Step Solution:

1. **Identify the Reactants**:
- The reactants in this reaction are iron filings (Fe) and dilute hydrochloric acid (HCl).

2. **Write the Chemical Equation**:
- When iron filings react with dilute hydrochloric acid, the chemical equation can be written as:
\[ \text{Fe (s)} + \text{HCl (aq)} \rightarrow \text{FeCl}_2 \text{ (aq)} + \text{H}_2 \text{ (g)} \]
- Here, Fe is in solid form, HCl is in aqueous solution, FeCl₂ is in aqueous solution, and H₂ is in gaseous form.

3. **Understand the Reaction Type**:
- This reaction is classified as a single displacement reaction (or single replacement reaction). In this type of reaction, one element (iron) displaces another element (hydrogen) from a compound (HCl).

4. **Identify the Products**:
- The products of this reaction are iron(II) chloride (FeCl₂) in aqueous solution and hydrogen gas (H₂).

5. **Conclusion**:
- When dilute hydrochloric acid is added to iron filings, hydrogen gas is released, and iron(II) chloride is formed.

### Final Answer:
When dilute hydrochloric acid is added to iron filings, hydrogen gas and iron(II) chloride are produced.

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