Which of the following gases is evolved when dilute hydrochloric acid is added to iron fillings?

Subject: General Science

Topic: Chemical Reactions and Equations

Options:

1. Option A: Chlorine gas
2. Option B: Oxygen gas
3. Option C: Hydrogen gas
4. Option D: Carbon dioxide gas

Correct Answer:

Option C: Hydrogen gas

Explanation:

The reaction is: Fe(s) + 2HCl(aq) → FeCl2(aq) + H2(g). Iron reacts with dilute hydrochloric acid to produce iron chloride and hydrogen gas. This is confirmed by the question in the text: 'What happens when dilute hydrochloric acid is added to iron fillings?' and the correct option is hydrogen gas and iron chloride are produced.