What happens when dilute hydrochloric acid is added to iron fillings? Tick the correct answer.
(a) Hydrogen gas and iron chloride are produced.
(b) Chlorine gas and iron hydroxide are produced.
(c) No reaction takes place.
(d) Iron salt and water are produced.
Answer:
(a) Hydrogen gas and iron chloride are produced.
Explanation:
When dilute hydrochloric acid (HCl) is added to iron filings (Fe), a chemical reaction takes place:
Fe + 2HCl → FeCl2 + H2↑
Iron chloride (FeCl₂) is formed
Hydrogen gas (H₂) is released (bubbles observed)